ZL8800ALBFTK

DATASHEET ZL8800 FN7558 Rev.6.00 Nov 8, 2017 Dual Channel/Dual Phase PMBus ChargeMode Control DC/DC Digital Controller The ZL8800 is a dual output or dual phase digital DC/DC controller. Each output can operate independently or be used together in a dual phase configuration for high current applications. Features The ZL8800 supports a wide range of output voltages (0.54V to 5.5V) operating from input voltages as low as 4.5V up to 14V. • Input voltage range: 4.5V to 5.5V or 6.5V to 14V • Unique compensation-free design, which is always stable • Output voltage range: 0.54V to 5.5V • 1% output voltage accuracy over line, load, and temperature • ChargeMode control achieves fast transient response and reduced output capacitance and provides output stability without compensation With the fully digital ChargeMode™ control, the ZL8800 will respond to a transient load step within a single switching cycle. This unique compensation-free modulation technique allows designs to meet transient specifications with minimum output capacitance, thus saving cost and board space. • Switching frequency range: 200kHz to 1.33MHz • Proprietary single wire DDC serial bus enables voltage sequencing and fault spreading with other Intersil ICs The proprietary single wire Digital-DC™ (DDC) serial bus enables the ZL8800 to communicate between other Intersil ICs. By using the DDC, the ZL8800 achieves complex functions such as inter-IC phase current balancing, sequencing, and fault spreading, eliminating complicated power supply managers with numerous external discrete components. • External power supply tracking • Cycle-by-cycle inductor peak current protection • Digital fault protection for output voltage UV/OV, input voltage UV/OV, temperature, and MOSFET driver voltage • 10-bit average output current measurement with adjustable gain settings for sensing with high current, low DCR inductors The ZL8800 features cycle-by-cycle output overcurrent protection. The input voltage, output voltages, and DrMOS/MOSFET driver supply voltages are overvoltage and undervoltage protected. One internal temperature sensor and two external temperature sensors are available for temperature monitoring, one of which is used for under-temperature and over-temperature protection. A snapshot parametric capture feature allows users to take a snapshot of operating and fault data during normal or fault conditions. • 10-bit monitor ADC measures input voltage, input current, output voltage, internal and external temperature, and driver voltage • Configurable to use standalone MOSFET drivers or integrated Driver-MOSFET (DrMOS) devices • Nonvolatile memory for storing operating parameters and fault events Integrated Low Dropout (LDO) regulators allow the ZL8800 to operate from a single input supply, eliminating the need for additional linear regulators. The LDO output can be used to power external drivers or DrMOS devices. • PMBus compliant Applications • Servers and storage equipment • Telecom and datacom equipment • Power supplies (memory, DSP, ASIC, FPGA) With full PMBus™ compliance, the ZL8800 is capable of measuring and reporting input voltage, input current, output voltage, and output current as well as the device’s internal temperature, two external temperatures, and an auxiliary voltage input. Related Literature • For a full list of related documents, visit our website - ZL8800 product page TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS PART NUMBER DUAL OUTPUT DUAL PHASE DDC CURRENT SHARE SPS SUPPORT ZL8800 Yes Yes No No ZL8801 No Yes Yes No ZL8802 Yes Yes Yes Yes FN7558 Rev.6.00 Nov 8, 2017 Page 1 of 88 ZL8800 Table of Contents Simplified Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ZL8800 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital-DC Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Management Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multimode Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configurable Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMBus Device Address Selection (SA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Voltage and VOUT_MAX Selection (VSET0,1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switching Frequency Setting (SYNC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input Voltage Undervoltage Lockout Setting (UVLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal Bias Regulators and Input Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TON_DELAY and Rise Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enable Pin Operation and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power-Good . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 12 12 12 13 13 13 13 14 14 15 15 15 15 Power Management Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Overvoltage Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Prebias Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Limit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input Current Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal Overload Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage Margining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Voltage Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMBus Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital-DC Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phase Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fault Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active Current Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperature Monitoring Using XTEMP Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvolatile Memory and Security Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC/DC Converter Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Train Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Monitoring Through SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 16 16 16 17 17 18 18 19 19 19 19 20 20 20 20 20 21 21 21 23 PMBus Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 PMBus Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 PMBus Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Firmware Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 FN7558 Rev.6.00 Nov 8, 2017 Page 2 of 88 ZL8800 Simplified Applications 9,1 9729 9'' 9,1 =/ 3:0 %67 9'59 9'' 9287 9729 9'' 9,1 9'59 3:0+ 3:0+ 3:0 %67 ,6/ 3:0/ 3:0/ (1 ,6/ 96: (1 *1' 9287 9729 96: *1' ,6(1$ ,6(1$ ,6(1% ,6(1% 96(13 96(13 96(11 96(11 ,17(5'(9,&( &20081,&$7,21 ''& (1 (1 6'$ 6&/ 6$/57 30%XV 3* 3* &21752/ $1' 67$786 *1' FIGURE 1. SIMPLIFIED TWO OUTPUT DRMOS APPLICATION =/ &21752/ $1'67$786 9,1 9'59 (1 (1 3:0+ 3:0/ 3* 3* 9,1 9'' 9'' 9,1 9729 3:0 %67 ,6/ (1 96: *1' 9287 9729 ,6(1$ ,6(1% ''& 3:0+ 3:0/ 30%XV 6'$ 6&/ 6$/57 9,1 9,1 9'59 9'' ,17(5'(9,&( &20081,&$7,21 3:0 %67 ,6/ (1 96: *1' ,6(1$ ,6(1% 96(1396(13 96(1196(11 *1' FIGURE 2. SIMPLIFIED TWO PHASE DRMOS APPLICATION FN7558 Rev.6.00 Nov 8, 2017 Page 3 of 88 ZL8800 Block Diagram PGA ADC ASCR DIGITAL PWM MODULATOR PWM+ DEAD TIME PWMH0 ASCR DIGITAL PWM MODULATOR PWM+ DEAD TIME PWMH1 PWML0 DAC VSEN0P/N PGA ADC PWML1 DAC VSEN1P/N XTEMP0P/N Mux XTEMP1P/N MONITOR ADC MGN0/1 VTRKP/N DIGITAL LOGIC + OV/UV/OC/UC COMPARATORS VMON VDD EN0/1 PG0/1 OSC DDC DIGITAL-DC INTER-DEVICE COMMUNICATIONS MICROCONTROLLER AND NONVOLATILE MEMORY PGA ISENB0 ISENA1 IPEAK/ IAVG ADC SDA ISENB1 IIN ADC 2 SCL ISENA0 IPEAK/ IAVG ADC PLL PGA CLK GEN SYNC I C AND SMBus SERIAL INTERFACE SALRT IINN IINP VDRVEN GAIN VDRV V25 VR5 VR6 LDOs VDD UVLO VSET1 VSET0 SA PIN-STRAP RESISTOR DETECTION FIGURE 3. BLOCK DIAGRAM FN7558 Rev.6.00 Nov 8, 2017 Page 4 of 88 ZL8800 9,1 729 5 9'' 9 & —) 5 Ÿ 9021 9 —) 5 NŸ 5 NŸ 8 9&,1 & —) &*1' 6 VTARGET FIGURE 7. OUTPUT RESPONSES TO PREBIAS VOLTAGES If a prebias voltage higher than the target voltage exists after the preconfigured TON_DELAY time and TON_RISE time have completed, the ZL8800 starts switching with a duty cycle that matches the prebias voltage. This ensures that the ramp-down from the prebias voltage is monotonic. The output voltage is then ramped down to the desired output voltage. If a prebias voltage higher than the overvoltage limit exists, the device will not initiate a turn-on sequence and will stay off with an output OV fault recorded. An output prebias condition exists when an externally applied voltage is present on a power supply's output before the power supply's control IC is enabled. Certain applications require that the converter not be allowed to sink current during start-up if a prebias condition exists at the output. The ZL8800 provides prebias protection by sampling the output voltage prior to initiating an output ramp. Output Overcurrent Protection If a prebias voltage lower than the desired output voltage is present after the TON_DELAY time, the ZL8800 starts switching with a duty cycle that matches the prebias voltage. This ensures that the ramp-up from the prebias voltage is monotonic. The output voltage is then ramped to the desired output voltage at the ramp rate set by the TON_RISE command. • Shut down and stay off until the fault has cleared and the device has been disabled and reenabled The resulting output voltage rise time will vary depending on the prebias voltage, but the total time elapsed from the end of the TON_DELAY time to when the TON_RISE time is complete and the output is at the desired value will match the preconfigured ramp time (see Figure 7). The default response from an overcurrent voltage fault is to shut down and stay off until the fault has cleared and the device has been disabled and reenabled (option 1). FN7558 Rev.6.00 Nov 8, 2017 The ZL8800 can protect the power supply from damage if the output is shorted to ground or if an overload condition is imposed on the output. After the current limit threshold has been selected (see “Current Limit Configuration” on page 17), the user can determine the desired response to the fault condition. The following overcurrent protection response options are available: • Shut down and, when the fault is no longer present, attempt to restart • Shut down and restart continuously after a delay Refer to the “PMBus Command Detail” section for details on how to select specific overvoltage fault response options using the IOUT_OC_FAULT_RESPONSE command. Page 16 of 88 ZL8800 CURRENT-SENSING COMPONENTS The ZL8800 uses the inductor DCR current-sensing technique. Current sensing is achieved by selecting an R/C network as shown in Figure 8. The ZL8800 provides an adjustable, maximum full scale sensing range. Three ranges are available: ±25mV, ±35mV, and ±50mV maximum input voltage. VIN VDRV ZL8800 VDD DRIVER PWMH PWML GH L VOUT By default, current-sensing is enabled during the inductor current down slope period of the switching period (D’). In applications where the steady state duty cycle is >0.5, for example, a 5V to 3.3V converter, the ZL8800 can be configured to sense current during the inductor up slope period of the switching cycle (D). BST GL R1 C1 ISENA The user has the option of selecting how many consecutive overcurrent readings must occur before an overcurrent fault and subsequent shutdown are initiated. Either 1, 3, 5, 7, 9, 11, or 13 consecutive faults can be selected. ISENB FIGURE 8. DCR CURRENT SENSING For the voltage across C1 to reflect the voltage across the DCR of the inductor, the time constant of the inductor must match the time constant of the RC network. That is:  RC   L / DCR (EQ. 1) L R1  C1  DCR For L, use the average of the nominal value and the minimum value. Include the effects of tolerance, DC bias, and switching frequency on the inductance when determining the minimum value of L. Use the typical room temperature value for DCR. The value of R1 should be as small as feasible and no greater than 5kΩ for best signal-to-noise ratio. The designer should make sure the resistor package size is appropriate for the power dissipated and include this loss in efficiency calculations. When calculating the minimum value of R1, the average voltage across C1 (which is the average IOUT · DCR product) is small and can be neglected. Therefore, the minimum value of R1 can be approximated by the following equation: D VIN  VOUT   1  D   VOUT  PR1 2 R1min 2 (EQ. 2) where PR1 is the maximum power dissipation specification for the resistor. After R1min has been calculated, solve for the maximum value of C1 from: C1max  L R1min  DCR (EQ. 3) and choose the next-lowest readily available value (for example, for C1max = 1.86µF, C1 = 1.5µF is a good choice), then substitute the chosen value into the same equation and recalculate the value of R1. Choose the 1% resistor standard value closest to this recalculated value of R1. Current Limit Configuration The ZL8800 gives the power supply designer several choices for the fault response during over or undercurrent condition. The user can select the number of violations allowed before declaring fault, a blanking time and the action taken when a fault is detected. These parameters are configured using the ISENSE_CONFIG command. FN7558 Rev.6.00 Nov 8, 2017 The blanking time represents the time when no current measurement is taken. This is to avoid taking a reading just after a current load step (less accurate due to potential ringing). It is a configurable parameter from 0 to 832ns. After the ISENSE_CONFIG parameters have been selected, the user must select the desired current limit thresholds and the resistance of the sensing element. The current limit thresholds are set with four commands: • IOUT_OC_FAULT_LIMIT – this sets the overcurrent threshold that must be exceeded by the number of consecutive times chosen in ISENSE_CONFIG. • IOUT_UC_FAULT_LIMIT – this is the same as IOUT_OC_FAULT_LIMIT, but represents the negative current that flows lower FET during the D’ interval. Large negative currents can flow during faults such as a higher voltage rail being shorted to a lower voltage rail. • IOUT_AVG_OC_FAULT_LIMIT – this limit is similar to IOUT_OC_FAULT_LIMIT, but the limit represents an average reading over several switching cycles. Because it is an average, the response time is slower, but the limit can be set closer to the maximum average expected output current. • IOUT_AVG_UC_FAULT_LIMIT – this limit is similar to IOUT_AVG_OC_FAULT_LIMIT, but represents the negative current that flows lower FET during the D’ interval. Input Current Monitor The input current can be monitored through the IINN and IINP pins. When no input current is being measured through the IINN and IINP pins, the input current can be estimated using the measured duty cycle and measured average output current. Fault detection is not allowed using the estimated input current. This estimation is enabled by setting IIN_SCALE to zero. The input current monitor input should be connected across a current-sensing resistor in series with the input supply. The IINP pin is connected to the input supply side of the current-sense resistor, and the IINN pin is connected to the ZL8800 VDD side of the current-sense resistor. Using the IIN_SCALE command, set the current-sense resistor value. Select the current-sense resistor value such that the maximum expected input current times the current-sense resistor value does not exceed the maximum current-sensing input voltage of 20mV. If this feature is not used, IINN and IINP should be tied to VDD. Page 17 of 88 ZL8800 The ZL8800 includes an on-chip thermal sensor that continuously measures the internal temperature of the die. This thermal sensor is used to provide both over-temperature and under-temperature protection. If the over-temperature limit is exceeded, or the temperature falls below the under-temperature limit, the ZL8800 is shut down. The over-temperature and under-temperature limits are set by the OT_FAULT_LIMIT and UT_FAULT_LIMIT, respectively. The ZL8800 will not attempt to restart until the temperature falls below the OT_WARN_LIMIT for over-temperature faults or rises above the UT_WARN_LIMIT for under-temperature faults. The default temperature limits are +125°C and -45°C, but the user can set the limits to different values if desired. Note that setting a higher over-temperature or under-temperature limit may result in permanent damage to the device. When the device has been disabled due to an internal temperature fault, the user can select one of several fault response options as follows: • Shut down and stay off until the fault has cleared and the device has been disabled and reenabled • Shut down and, when the fault is no longer present, attempt to restart • Shut down and restart continuously after a delay The default response from an over-temperature or under-temperature fault is to shut down and stay off until the fault has cleared and the device has been disabled and reenabled (option 1). Refer to “PMBus Command Summary” on page 25 for details about how to select specific overvoltage fault response options using the OT_FAULT_RESPONSE and UT_FAULT_RESPONSE commands. Voltage Tracking Numerous high performance systems place stringent demands on the order in which the power supply voltages are turned on. This is particularly true when powering FPGAs, ASICs, and other advanced processor devices that require multiple supply voltages to power a single die. In most cases, the I/O interface operates at a higher voltage than the core and therefore, the core supply voltage must not exceed the I/O supply voltage according to the manufacturers' specifications. The ZL8800 integrates a tracking scheme that allows one of its outputs (Channel 0 or Channel 1, or the single output in a dual phase application) to track a voltage that is applied to the VTRK pin with no external components required. The VTRK pin is an analog input that, when the tracking mode is enabled, configures the voltage applied to the VTRK pin to act as a reference for the device’s output regulation. • Ratio-metric. This mode configures the ZL8800 to ramp its output voltage at a rate that is a percentage of the voltage applied to the VTRK pin. The default setting is 50%, but an external resistor string can be used to configure a different tracking ratio. The device that is tracking another output voltage (slave) must be set to its desired steady-state output voltage. The master ZL8800 device in a tracking group is defined as the device that has the highest target output voltage within the group. This master device will control the ramp rate of all tracking devices and is not configured for tracking mode. The maximum tracking rise time is 1V/ms. The slave device must be enabled before the master. Any device that is configured for tracking mode will ignore its TON_DELAY and TON_RISE settings and its output will take on the turn-on/turn-off characteristics of the reference voltage present at the VTRK pin. Tracking mode can be configured by using the TRACK_CONFIG command. Note that current sharing groups that are also configured to track another voltage do not offer prebias protection; a minimum load should therefore be enforced to avoid the output voltage from being held up by an outside source. VIN ZL8800 VTRK Thermal Overload Protection Q1 L1 Q2 Vo2 C1 Vo1 VOUT Vo1 Vo2 TIME COINCIDENT VOUT Vo1 Vo2 Figure 9 illustrates the typical connection and the two tracking modes: • Coincident. This mode configures the ZL8800 to ramp its output voltage at the same rate as the voltage applied to the VTRK pin until it reaches its desired output voltage. The device that is tracking another output voltage (slave) must be set to its desired steady-state output voltage. FN7558 Rev.6.00 Nov 8, 2017 TIME RATIOMETRIC FIGURE 9. TRACKING MODES Page 18 of 88 ZL8800 Voltage Margining The ZL8800 offers a simple method to vary its output higher or lower than its nominal voltage setting to determine whether the load device is capable of operating over its specified supply voltage range. Margining is controlled through the OPERATION command. Default margin limits of VOUT ±5% are preloaded in the factory, but the margin limits can be modified through PMBus commands to be as high as VOUT + 10% or as low as 0V, where VOUT is the nominal output voltage set point determined by the VSET pin or the VOUT_COMMAND command. A safety feature prevents the user from configuring the output voltage to exceed VOUT + 10% under any condition. Additionally, the transition rate between the nominal output voltage and either margin limit can be configured using the VOUT_TRANSITION_RATE command. External Voltage Monitoring The voltage monitoring (VMON) pin can monitor the voltage supply for the external driver IC. The VMON input must be scaled by a 16:1 ratio in order to read-back the VMON voltage correctly. A 100kΩ and 6.65kΩ resistor divider is recommended. Overvoltage and undervoltage fault thresholds can be set using the MFR_VMON_OV_FAULT_LIMIT and MFR_VMON_UV_FAULT_LIMIT commands. The response to these limits are set using the VMON_OV_FAULT_RESPONSE and VMON_ UV_FAULT_RESPONSE commands. When the device has been disabled due to a VMON fault, the user can select one of the following fault response options: • Shut down and stay off until the fault has cleared and the device has been disabled and reenabled • Shut down and, when the fault is no longer present, attempt to restart • Shut down and restart continuously after a delay The default response from an overvoltage or undervoltage VMON fault is to shut down and stay off until the fault has cleared and the device has been disabled and reenabled (option 1). SMBus Communications The ZL8800 provides a SMBus digital interface. The ZL8800 can be used with any standard 2-wire SMBus host device. In addition, the device is compatible with SMBus version 2.0 and includes a SALRT line to help reduce bandwidth limitations related to continuous fault monitoring. Pull-up resistors are required on the SMBus. The pull-up resistor can be tied to VR5 or to an external 3.3V or 5V supply as long as this voltage is present before or during device power-up. The ideal design will use a central pull-up resistor that is well-matched to the total load capacitance. The minimum pull-up resistance should be limited to a value that enables any device to assert the bus to a voltage that will ensure a logic 0 (typically 0.8V at the device monitoring point) given the pull-up voltage (5V if tied to VR5) and the pull-down current capability of the ZL8800 (nominally 4mA). A pull-up resistor of 10kΩ is a good value for most applications. FN7558 Rev.6.00 Nov 8, 2017 SMBus data and clock lines should be routed with a closely coupled return or ground plane to minimize coupled interference (noise). Excessive noise on the data and clock lines that cause the voltage on these lines to cross the high and low logic thresholds of 2.0V and 0.8V, respectively, will cause command transmissions to be interrupted and result in slow bus operation or missed commands. A 10kΩ resistor provides good performance on an SMBus with fewer than 10 devices. The ZL8800 accepts most standard PMBus commands. When enabling the device with the ON_OFF_CONFIG command, it is recommended that the enable pin is tied to SGND. In addition to bus noise considerations, it is important to ensure that user connections to the SMBus are compliant to the PMBus command standards. Any device that can malfunction in a way that permanently shorts SMBus lines will disable PMBus communications. Incomplete PMBus commands can also cause the ZL8800 to halt PMBus communications. This can be corrected by disabling, then reenabling the device. Digital-DC Bus The Digital-DC Communications (DDC) bus is used to communicate between Intersil Digital-DC devices and within the ZL8800 itself. This dedicated bus provides the communication channel between devices for features such as sequencing, fault spreading, and current sharing. The DDC pin must be pulled up to VR5 (or configured as a push-pull output using the GLOBAL_USER_CONFIG command) even if the ZL8800 is operating in standalone. In addition, the DDC pin must be pulled up or configured as a push-pull output before the Enable pin is set high. Push-pull mode can be used only when the ZL8800 is operating in standalone mode. The DDC pins on all Digital-DC devices that use sequencing, fault spreading, or current sharing must be connected together. The DDC pins on all Digital-DC devices in an application should be connected together. A pull-up resistor is required on the DDC bus to guarantee the rise time as follows: Rise time = RPU * CLOAD ≤ 1 µs Where RPU is the DDC bus pull-up resistance and CLOAD is the bus loading. The pull-up resistor must be tied to VR5. Generally, each device connected to the DDC bus presents approximately 12pF of capacitive loading. The ideal design will use a central pull-up resistor that is well-matched to the total load capacitance. In power module applications, the user should consider whether to place the pull-up resistor on the module or on the PCB of the end application. The minimum pull-up resistance should be limited to a value that enables any device to assert the bus to a voltage that will ensure a logic 0 (typically 0.8V at the device monitoring point) and the pull-down current capability of the ZL8800 (nominally 4mA). As with SMBus data and clock lines, the DDC data line should be routed with a closely coupled return or ground plane to minimize coupled interference (noise). Excessive noise on the DDC signal can cause the voltage on this line to cross the high and low logic thresholds of 2V and 0.8V, respectively, and will cause command transmissions to be interrupted and result in slow bus operation or missed commands. For less than 10 devices on the DDC bus, a 10kΩ resistor provides good performance. Page 19 of 88 ZL8800 When multiple point of load converters share a common DC input supply, it is desirable to adjust the clock phase offset of each device so that not all devices have coincident rising edges. Setting each converter to start its switching cycle at a different point in time can dramatically reduce input capacitance requirements. Since the peak current drawn from the input supply is effectively spread out over a period of time, the peak current drawn at any given moment is reduced and the power losses proportional to IRMS2 are reduced. To enable phase spreading, all converters must be synchronized to the same switching clock. Configuring the SYNC pin is described in “Configurable Pins” on page 13. Selecting the phase offset for the device is accomplished by selecting a device address according to the following calculation: Phase offset = device address x 45° This behavior is illustrated in Table 7: TABLE 7. PHASE OFFSET ADDRESS LSB PHASE OFFSET (°) ADDRESS LSB PHASE OFFSET (°) 0 0 8 0 1 45 9 45 2 90 A 90 3 135 B 135 4 180 C 180 5 225 D 225 6 270 E 270 7 315 F 315 durations such that sequel devices start after their associated prequel devices. The drawback to this method is that if a prequel device fails to start properly, its sequel device will still start and ramp on according to its delay and rise time settings. Fault Spreading Digital DC devices can be configured to broadcast a fault event over the DDC bus to the other devices in the group. When a fault occurs and the device is configured to shut down on a fault, the device will shut down and broadcast the fault event over the DDC bus. The other devices on the DDC bus will shut down together if configured to do so, and will attempt to restart in their prescribed order if configured to do so. Active Current Sharing The two channels of the ZL8800 can be used in parallel to create a dual phase power rail. The device outputs will share the current equally within a few percent. Figure 10 shows a typical connection for a dual phase application. When used in this configuration, the ZL8800 can current share between phases without using output voltage droop. VIN DRIVER Phase Spreading VOUT ZL8800 Output Sequencing VIN DRIVER The phase offset of each device can also be set to any value between 0° and 360° in 22.5° increments using the INTERLEAVE PMBus command. A group of Intersil devices can be configured to power up in a predetermined sequence. This feature is especially useful when powering advanced processors, FPGAs, and ASICs that require one supply to reach its operating voltage prior to another supply reaching its operating voltage to avoid latch-up from occurring. Multidevice sequencing can be achieved by configuring each device using the SEQUENCE PMBus command. Multiple device sequencing is achieved by issuing PMBus commands to assign the preceding device in the sequencing chain as well as the device that will follow in the sequencing chain. The enable (EN) pins of all devices in a sequencing group must be tied together and driven high to initiate a sequenced turn-on of the group. Enable must be driven low to initiate a sequenced turnoff of the group. Sequencing can also be accomplished by connecting the enable pin of a sequel device to the Power-good pin of a prequel device. Sequencing is also achieved by using the TON_DELAY and TON_RISE commands and choosing appropriate delay and rise FN7558 Rev.6.00 Nov 8, 2017 FIGURE 10. DUAL PHASE EXAMPLE Temperature Monitoring Using XTEMP Pin Each channel of the ZL8800 supports measurement of an external device temperature using either a thermal diode integrated in a processor, FPGA, or ASIC, or using a discrete diode-connected 2N3904 NPN transistor. Figure 11 on page 21 illustrates the typical connections required. A noise filtering capacitor, not exceeding 100pF, should be connected across the external temperature sensing device. The external temperature sensors can be used to provide the temperature reading for over-temperature and under-temperature faults. The external sensors can also be used to provide more accurate temperature compensation for inductor DCR current sensing by being placed Page 20 of 88 ZL8800 close to the inductor. These options for the external temperature sensors are selected using the USER_CONFIG PMBus command. VIN XTEMPxP ZL 2N3904 ZL8800 XTEMPxN ZL1505 QH 100 pF L VOUT C QL Discrete NPN FIGURE 12. SYNCHRONOUS BUCK CONVERTER XTEMPxP ZL 100pF XTEMPxN µP FPGA DSP ASIC Embedded Thermal Diode FIGURE 11. EXTERNAL TEMPERATURE MONITORING Nonvolatile Memory and Security Features The ZL8800 has internal nonvolatile memory that stores user configurations. Integrated security measures ensure that the user can only restore the device to a level that has been made available to them. During the initialization process, the ZL8800 checks for stored values contained in its internal non-volatile memory. The ZL8800 offers two internal memory storage units that are accessible by the user as follows: • Default Store: A power supply module manufacturer may want to protect the module from damage by preventing the user from being able to modify certain values that are related to the physical construction of the module. In this case, the module manufacturer would use the Default Store and would allow the user to restore the device to its default setting but would restrict the user from restoring the device to the factory settings. • User Store: The manufacturer of a piece of equipment may want to provide the ability to modify certain power supply settings while still protecting the equipment from modifying values that can lead to a system level fault. The equipment manufacturer would use the User Store to achieve this goal. The User Store takes priority over the Default Store. If there are no values set in the User or Default Store, the device will use the pin-strap setting value. Figure 12 illustrates the basic synchronous buck converter topology showing the primary power train components. This converter is also called a step-down converter, as the output voltage must always be lower than the input voltage. DUAL OUTPUT PWM PER CHANNEL The ZL8800 has been designed to provide independent upper and lower FET drive signals to a two-input MOSFET driver such as the ZL1505. The ZL8800 uses adaptive dead time control to improve the power conversion efficiency. The ZL8800 monitors the power converter’s operating conditions and continuously adjusts the turn-on and turn-off timing of the high-side and low-side driver input signals to optimize the overall efficiency of the power supply. The ZL8800 can also be used with single-ended DrMOS integrated driver and MOSFET devices. Power supplies using DrMOS devices can be made smaller than discrete solutions using separate drivers and MOSFETs, but at a slightly lower efficiency. The option to use DrMOS or drivers and discrete MOSFETs is set using the USER_CONFIG command. Power Train Component Selection The ZL8800 is a dual output or dual phase synchronous buck converter that uses external drivers, MOSFETs, inductors, and capacitors to perform the power conversion process. The proper selection of the external components is critical for optimized performance. To select the appropriate external components for the desired performance goals, the power supply requirements listed in Table 8 must be known. TABLE 8. POWER SUPPLY REQUIREMENTS PARAMETER EXAMPLE VALUE DC/DC Converter Design Input Voltage (VIN) 12V The ZL8800 operates as a voltage-mode, synchronous buck converter with a selectable constant frequency pulse width modulator (PWM) control scheme that uses external driver, MOSFETs, capacitors, and an inductor to perform power conversion. Output Voltage (VOUT) 1.2V Output Current (IOUT) 30A Output Voltage Ripple (Vorip) Output Load Step (Iostep) Output Load Step Rate 50% of Io 10A/µs Output Deviation Due to Load Step ±2% Maximum PCB Temperature 85°C Desired Efficiency 90% Other Considerations FN7558 Rev.6.00 Nov 8, 2017 1% of VOUT Optimize for small size Page 21 of 88 ZL8800 DESIGN GOAL TRADE-OFFS ILrms is given by: The design of the buck power stage requires several compromises among size, efficiency, and cost. The inductor core loss increases with frequency, so there is a trade-off between a small output filter made possible by a higher switching frequency and getting better power supply efficiency. Size can be decreased by increasing the switching frequency at the expense of efficiency. Cost can be minimized by using through-hole inductors and capacitors, however, these components are physically large. To start the design, select a switching frequency based on Table 9. This frequency is a starting point and can be adjusted as the design progresses. TABLE 9. CIRCUIT DESIGN CONSIDERATIONS FREQUENCY RANGE EFFICIENCY CIRCUIT SIZE 200 to 400kHz Highest Larger 400 to 800kHz Moderate Smaller 800kHz to 1.33MHz Lower Smallest INDUCTOR SELECTION The output inductor selection process must include several trade-offs. A high inductance value will result in a low ripple current (ΔIL), which will reduce output capacitance and produce a low output ripple voltage, but may also compromise output transient load performance. Therefore, a balance must be struck between output ripple and optimal load transient performance. A good starting point is to select the output inductor ripple equal to 30 to 50% of the maximum output current (IOUT). ΔIL = 0.5* IOUT Now the output inductance can be calculated using the following equation, where VIN is the input voltage:  V VOUT  1  OUT VIN  L  f sw  I L    (EQ. 4) The average inductor current is equal to the maximum output current. The peak inductor current (ILpk) is calculated using the following equation where IOUT is the maximum output current: I Lpk  I OUT  I I L 2 Select an inductor rated for the average DC current and with saturation current rating above the peak current calculated above. After an inductor is selected, the DCR and core losses in the inductor are calculated. Use the DCR specified in the inductor manufacturer’s datasheet. 2 (EQ. 6) where IOUT is the maximum output current. Next, calculate the core loss of the selected inductor. Since this calculation is specific to each inductor and manufacturer, refer to the chosen inductor datasheet. Add the core loss and the ESR loss and compare the total loss to the maximum power dissipation recommendation in the inductor datasheet. OUTPUT CAPACITOR SELECTION Several trade-offs must also be considered when selecting an output capacitor. Low ESR values are needed to have a small output deviation (Vstep) during transient load steps and low output voltage ripple (ΔV). However, capacitors with low ESR, such as X5R and X7R dielectric ceramic capacitors, also have relatively low capacitance values. Many designs can use a combination of high capacitance devices and low ESR devices in parallel. For high ripple currents, a low capacitance value can cause a significant amount of output voltage ripple. Likewise, in high transient load steps, a relatively large amount of capacitance is needed to minimize the output voltage deviation while the inductor current ramps up or down to the new steady state output current value. As a starting point, apportion one-half of the output ripple voltage to the capacitor ESR and the other half to capacitance, as shown in the following equations: I L COUT  8  f sw  ESR  V (EQ. 8) 2 V (EQ. 9) 2  I L Use these values to make an initial capacitor selection, using a single capacitor or several capacitors in parallel. After a capacitor has been selected, the resulting output voltage ripple can be calculated using the following equation: V  I L  ESR  I L 8  f sw  COUT (EQ. 10) Because each part of this equation was made to be less than or equal to half of the allowed output ripple voltage, the ΔV should be less than the desired maximum output ripple. INPUT CAPACITOR It is highly recommended that dedicated input capacitors be used in any point-of-load design, even when the supply is powered from a heavily filtered 5V or 12V “bulk” supply from an off-line power supply. This is because of the high RMS ripple current that is drawn by the buck converter topology. This ripple (IinRMS) can be determined from the following equation: I inRMS  I OUT  D FN7558 Rev.6.00 Nov 8, 2017 (EQ. 7) 12 (EQ. 5) 2 PLDCR  DCR  I Lrms 2 I Lrms  I OUT  (EQ. 11) Page 22 of 88 ZL8800 Without capacitive filtering near the power supply circuit, this current would flow through the supply bus and return planes, coupling noise into other system circuitry. The input capacitors should be rated above the ripple current calculated above and the maximum expected input voltage. QL SELECTION The bottom or lower MOSFET should be selected with the lowest possible rDS(ON) while maintaining the desired circuit size and cost. Calculate the RMS current in QL as follows: I QLRMS  I OUT  1  D (EQ. 12) PQL  RDSON I botrms  (EQ. 13) Note that the rDS(ON) given in the manufacturer’s datasheet is measured at +25°C. The actual rDS(ON) in the end-use application will be much higher. Select a candidate MOSFET and calculate the required gate drive current as follows: I g  f SW  Q g (EQ. 14) MOSFETs with lower rDS(ON) tend to have higher gate charge requirements, which increases the current and resulting power required to turn them on and off. QH SELECTION In addition to the rDS(ON) loss and gate charge loss, QH also has switching loss. Select QH with a lower gate charge, keeping in mind that QH’s rDS(ON) will be higher as a result. As was done with QL, calculate the RMS current as follows: I QHRMS  I OUT  D (EQ. 15) PQH  RDSON I QHRMS  2 (EQ. 16) Next, calculate the switching time using: t SW  Qg (EQ. 17) I DR where Qg is the gate charge of the selected QH and IDR is the peak gate drive current available from the gate drive IC. To calculate the switching time, use the ZL1505s minimum guaranteed drive current of 3 A for a conservative design. Using the calculated switching time, calculate the switching power loss in QH using: Pswtop  V INM  t sw  I OUT  f sw (EQ. 18) The total power dissipated by QH is given by the following equation: PQHtot  PQH  Pswtop FN7558 Rev.6.00 Nov 8, 2017 After the power dissipations for QH and QL have been calculated, the MOSFET’s junction temperature can be estimated. Using the junction-to-case thermal resistance (Rth) given in the MOSFET manufacturer’s datasheet and the expected maximum Printed Circuit Board (PCB) temperature, calculate the junction temperature as follows: T j max  T pcb  PQ  Rth  (EQ. 20) To calculate power losses and junction temperature rise in DrMOS devices, consult the datasheet and application notes for the DrMOS device selected. EFFICIENCY OPTIMIZED DRIVER DEAD TIME CONTROL Calculate the power dissipated due to rDS(ON) as follows: 2 MOSFET THERMAL CHECK (EQ. 19) The ZL8800 uses a closed loop algorithm to optimize the dead time applied between the gate drive signals for the top and bottom FETs. In a synchronous buck converter, the MOSFET drive circuitry must be designed such that the top and bottom MOSFETs are never in the conducting state at the same time. Potentially damaging currents flow in the circuit if both top and bottom MOSFETs are simultaneously on for periods of time exceeding a few nanoseconds. Conversely, long periods of time in which both MOSFETs are off reduce overall circuit efficiency by allowing current to flow in their parasitic body diodes. Minimize this dead time to provide optimum circuit efficiency. In the first order model of a buck converter, the duty cycle is determined by the equation: D VOUT VIN (EQ. 21) However, the real duty cycle sometimes extends beyond the ideal. Dead time can be manipulated to improve efficiency. The ZL8800 has an internal algorithm that constantly adjusts dead time nonoverlap to minimize duty cycle, thus maximizing efficiency. This circuit will null out dead time differences due to component variation, temperature, and loading effects. This algorithm is independent of application circuit parameters such as MOSFET type, gate driver delays, rise and fall times, and circuit layout. In addition, it does not require drive or MOSFET voltage or current waveform measurements. Adaptive dead time is enabled using the DEADTIME_CONFIG PMBus command. Adaptive dead time is only effective when a discrete driver (such as the ZL1505) and MOSFETs are used. When DrMOS devices are selected using USER_CONFIG, adaptive dead time is automatically disabled. Dead time minimum and maximum limits can be set using the DEADTIME PMBus command. Monitoring Through SMBus A system controller can monitor a wide variety of different ZL8800 parameters through the SMBus interface. The device can monitor for fault conditions by monitoring the SALRT pin, which will be asserted when any number of preconfigured fault conditions occur. Page 23 of 88 ZL8800 The device can also be monitored continuously for any number of power conversion parameters including but not limited to the following: • Input voltage • Output voltage • Input current • Output current • Internal junction temperature • Temperature of an external device • Switching frequency • Duty cycle • Fault status information FN7558 Rev.6.00 Nov 8, 2017 The PMBus host should respond to SALRT as follows: 1. The ZL device pulls SALRT Low. 2. The PMBus host detects that SALRT is now low and performs transmission with Alert Response Address to find which ZL device is pulling SALRT low. 3. The PMBus host talks to the ZL device that has pulled SALRT low. The actions that the host performs are up to the system designer. If multiple devices are faulting, SALRT will still be low after doing the above steps and will require transmission with the Alert Response Address repeatedly until all faults are cleared. Refer to the “PMBus Command Summary” on page 25 for details on how to monitor specific parameters through the SMBus interface. Page 24 of 88 ZL8800 PMBus Command Summary CODE COMMAND NAME DESCRIPTION DATA TYPE FORMAT DEFAULT VALUE DEFAULT SETTING 00h PAGE Selects Controller 0, 1, or both R/W BIT 00h Both controllers addressed 01h OPERATION Enable/disable, margin settings R/W BIT 00h Immediate off, nominal margin 02h ON_OFF_CONFIG On/off configuration settings R/W BIT 17h ENABLE pin control, active high 03h CLEAR_FAULTS Clears faults Write N/A N/A N/A 11h STORE_DEFAULT_ALL Stores values to default store Write N/A N/A N/A 12h RESTORE_DEFAULT_ALL Restores values from default store Write N/A N/A N/A 15h STORE_USER_ALL Stores values to user store Write N/A N/A N/A 16h RESTORE_USER_ALL Restores values from user store Write N/A N/A N/A 20h VOUT_MODE Reports VOUT mode and exponent Read BIT 13h Linear mode, exponent = -13 21h VOUT_COMMAND Sets nominal VOUT set-point R/W L16u 23h VOUT_CAL_OFFSET Applies offset voltage to VOUT set-point R/W L16s 24h VOUT_MAX Sets maximum VOUT set-point R/W L16u 1.1 X VOUT_COMMAND pin-strap setting 25h VOUT_MARGIN_HIGH Sets VOUT set-point during margin high R/W L16u 1.05 x VOUT_COMMAND pin-strap setting 26h VOUT_MARGIN_LOW Sets VOUT set-point during margin low R/W L16u 0.95 x VOUT_COMMAND pin-strap setting 27h VOUT_TRANSITION_RATE Sets VOUT transition rate during margin commands R/W L11 BA00h 28h VOUT_DROOP Sets V/I slope R/W L11 0000h 33h FREQUENCY_SWITCH Sets switching frequency R/W L11 Pin-strap setting 37h INTERLEAVE Configures phase offset during group operation R/W BIT Set by pin-strapped PMBus address 38h IOUT_CAL_GAIN Sets impedance of current sense circuit R/W L11 AA66h 0.3mΩ 39h IOUT_CAL_OFFSET Sets an offset to IOUT sense circuit R/W L11 0000h 0A 40h VOUT_OV_FAULT_LIMIT Sets the VOUT overvoltage fault threshold R/W L16u 41h VOUT_OV_FAULT_RESPONSE Sets the VOUT overvoltage fault response R/W BIT 44h VOUT_UV_FAULT_LIMIT Sets the VOUT undervoltage fault threshold. Must be set lower than POWER_GOOD_ON R/W Pin-strap setting 0000h 0V 1V/ms 0mV/A 1.15 x VOUT_COMMAND pin-strap setting 80h Disable, no retry 0.85 x VOUT_COMMAND pin-strap setting L16u 45h VOUT_UV_FAULT_RESPONSE Sets the VOUT undervoltage fault response R/W BIT 80h 46h IOUT_OC_FAULT_LIMIT Sets the IOUT peak overcurrent fault threshold R/W L11 DA80h 20A 4Bh IOUT_UC_FAULT_LIMIT Sets the IOUT valley undercurrent fault threshold R/W L11 DD80h -20A 4Fh OT_FAULT_LIMIT Sets the over-temperature fault limit R/W L11 EBE8h +125˚C 50h OT_FAULT_RESPONSE Sets the over-temperature fault response R/W BIT 80h 51h OT_WARN_LIMIT Sets the over-temperature warning limit R/W L11 EB70h +110°C 52h UT_WARN_LIMIT Sets the under-temperature warning limit R/W L11 DC40h -30°C 53h UT_FAULT_LIMIT Sets the under-temperature fault limit R/W L11 E530h -45°C 54h UT_FAULT_RESPONSE Sets the under-temperature fault response R/W BIT 80h 55h VIN_OV_FAULT_LIMIT Sets the VIN overvoltage fault threshold R/W L11 D380h FN7558 Rev.6.00 Nov 8, 2017 Disable, no retry Disable, no retry Disable, no retry 14V Page 25 of 88 ZL8800 PMBus Command Summary CODE COMMAND NAME (Continued) DESCRIPTION DATA TYPE FORMAT DEFAULT VALUE DEFAULT SETTING 56h VIN_OV_FAULT_RESPONSE Sets the VIN overvoltage fault response R/W BIT 80h Disable, no retry 57h VIN_OV_WARN_LIMIT Sets the VIN overvoltage warning threshold R/W L11 D360h 58h VIN_UV_WARN_LIMIT Sets the VIN undervoltage warning threshold R/W L11 N/A 1.03 x VIN_UV_FAULT_LIMIT pin-strap setting 13.5V 59h VIN_UV_FAULT_LIMIT Sets the VIN undervoltage fault threshold R/W L11 N/A Pin-strap setting 5Ah VIN_UV_FAULT_RESPONSE Sets the VIN undervoltage fault response R/W BIT 80h Disable, no retry 5Eh POWER_GOOD_ON Sets the voltage threshold for Power-good indication. Must be set higher than R/W VOUT_UV_FAULT_LIMIT L16u N/A 0.9 x VOUT_COMMAND pin-strap setting 60h TON_DELAY Sets the delay time from enable to VOUT rise R/W L11 CA80h 5ms 61h TON_RISE Sets the rise time of VOUT after ENABLE and TON_DELAY R/W L11 CA80h 5ms 64h TOFF_DELAY Sets the delay time from DISABLE to start R/W of VOUT fall L11 0000h 0ms (immediate off) 65h TOFF_FALL Sets the fall time for VOUT after DISABLE R/W and TOFF_DELAY L11 CA80h 5ms 78h STATUS_BYTE Summary of most critical faults Read BIT 00h No faults 79h STATUS_WORD Summary of critical faults Read BIT 0000h No faults 7Ah STATUS_VOUT Reports VOUT warnings/faults Read BIT 00h No faults 7Bh STATUS_IOUT Reports IOUT warnings/faults Read BIT 00h No faults 7Ch STATUS_INPUT Reports input warnings/faults Read BIT 00h No faults 7Dh STATUS_TEMP Reports temperature warnings/faults Read BIT 00h No faults 7Eh STATUS_CML Reports communication, memory, and logic errors Read BIT 00h No errors 80h STATUS_MFR_SPECIFIC Reports voltage monitoring/clock synchronization faults Read BIT 00h No faults 88h READ_VIN Reports input voltage measurement Read L11 N/A N/A 89h READ_IIN Reports input current measurement Read L11 N/A N/A 8Bh READ_VOUT Reports output voltage measurement Read L16u N/A N/A 8Ch READ_IOUT Reports output current measurement Read L11 N/A N/A 8Dh READ_TEMPERATURE_1 Reports internal temperature measurement Read L11 N/A N/A 8Eh READ_TEMPERATURE_2 Reports external temperature measurement Read L11 N/A N/A 94h READ_DUTY_CYCLE Reports actual duty cycle Read L11 N/A N/A 95h READ_FREQUENCY Reports actual switching frequency Read L11 N/A N/A 99h MFR_ID Sets a user defined identification R/W ASC N/A 9Ah MFR_MODEL Sets a user defined model R/W ASC N/A 9Bh MFR_REVISION Sets a user defined revision R/W ASC N/A 9Ch MFR_LOCATION Sets a user defined location identifier R/W ASC N/A 9Dh MFR_DATE Sets a user defined date R/W ASC N/A 9Eh MFR_SERIAL Sets a user defined serialized identifier R/W ASC N/A FN7558 Rev.6.00 Nov 8, 2017 Page 26 of 88 ZL8800 PMBus Command Summary CODE COMMAND NAME (Continued) DESCRIPTION DATA TYPE FORMAT DEFAULT VALUE DEFAULT SETTING ADh IC_DEVICE_ID Reports device identification information Read CUS 49A02400h Intersil, ZL8800 AEh IC_DEVICE_REV Reports device revision information Read CUS 00000000h Initial Release B0h USER_DATA_00 Sets a user defined data R/W ASC N/A BFh DEADTIME_MAX Sets the max dead time value for the adaptive dead time R/W BIT 3838h 56ns, 56ns D0h ISENSE_CONFIG Configures current sensing circuitry R/W BIT 4204h Downslope, 5 fault count, 256ns blanking, low range D1h USER_CONFIG Configures several user-level features R/W BIT 0402h Enable XTEMP0, 1, PG open-drain, DRMOS enabled D2h IIN_CAL_GAIN Sets the resistance of the input current sensing resistor R/W L11 C200h 2mΩ D3h DDC_CONFIG Configures the DDC addressing and current sharing R/W BIT N/A D4h POWER_GOOD_DELAY Sets the delay between PG threshold and R/W PG assertion L11 BA00h 1ms D6h INDUCTOR Sets the inductor value R/W L11 B23D 0.56µH D7h VOUT_MARGIN_RATIO % MARGIN_HIGH, LOW above/below VOUT_COMMAND R/W L11 CA80h 5% D8h OVUV_CONFIG Configures output voltage OV/UV fault detection R/W BIT 00h D9h XTEMP_SCALE Calibrates external temperature sensor R/W L11 BA00h 1/°C DAh XTEMP_OFFSET Offset calibration for external temperature sensor R/W L11 0000h No offset DCh TEMPCO_CONFIG Sets tempco settings R/W BIT 27h DDh DEADTIME Sets default dead time settings R/W L8s 1010h 16ns/16ns DEh DEADTIME_CONFIG Configures the adaptive dead time optimization mode R/W BIT 0808h Adaptive dead time enabled, 8ns/8ns DFh ASCR_CONFIG Configures the ASCR settings R/W BIT E0h SEQUENCE DDC rail sequencing configuration R/W BIT 00h Prequel and sequel disabled E1h TRACK_CONFIG Configures voltage tracking modes R/W BIT 00h Tracking disabled E2h DDC_GROUP Configures group ID, fault spreading, OPERATION and VOUT R/W BIT 000000h E4h DEVICE_ID Returns the device identifier string Read ASC N/A ZL8800, current revisions E5h MFR_IOUT_OC_FAULT_RESPONSE Configures the IOUT overcurrent fault response R/W BIT 80h Disable, no retry E6h MFR_IOUT_UC_FAULT_RESPONSE Configures the IOUT undercurrent fault response R/W BIT 80h Disable, no retry E7h IOUT_AVG_OC_FAULT_LIMIT Sets the IOUT average overcurrent fault threshold R/W L11 DA00h 16A E8h IOUT_AVG_UC_FAULT_LIMIT Sets the IOUT average undercurrent fault threshold R/W L11 DE00h -16A E9h USER_GLOBAL_CONFIG Sets options pertaining to advanced features R/W BIT 0000h Numerous device settings EAh SNAPSHOT 32-byte read back of parametric and status values Read BIT N/A FN7558 Rev.6.00 Nov 8, 2017 Set by pin-strapped PMBus address Low-side FET off on fault, 1 violation triggers fault 3900ppm/°C 015A0100h Gain = 256, Residual = 90 Ignore broadcast, sequenced shutdown Page 27 of 88 ZL8800 PMBus Command Summary CODE COMMAND NAME (Continued) DESCRIPTION DATA TYPE FORMAT DEFAULT VALUE DEFAULT SETTING EBh BLANK_PARAMS Indicates recently saved parameter values Read BIT FFF...FFFh F0h LEGACY_FAULT_GROUP Configures fault group compatibility with R/W older Intersil digital power devices BIT 00000000h F3h SNAPSHOT_CONTROL Snapshot feature control command R/W BIT N/A N/A F4h RESTORE_FACTORY Restores device to the hard-coded default Write values N/A N/A N/A F5h MFR_VMON_OV_FAULT_LIMIT Sets the VMON overvoltage fault threshold R/W L11 D300h 12V F6h MFR_VMON_UV_FAULT_LIMIT Sets the VMON undervoltage fault threshold R/W L11 CA40h 4.5V F7h MFR_READ_VMON Reads the VMON voltage Read L11 N/A N/A F8h VMON_OV_FAULT_RESPONSE Configures the VMON overvoltage fault response R/W BIT 80h Disable, no retry F9h VMON_UV_FAULT_RESPONSE Configures the VMON undervoltage fault response R/W BIT 80h Disable, no retry FAh SECURITY_LEVEL Reports the security level Read Hex 01h Public security level FBh PRIVATE_PASSWORD Sets the private password string R/W ASC 00…00h FCh PUBLIC_PASSWORD Sets the public password string R/W ASC 00…00h FDh UNPROTECT Identifies which commands are protected R/W Custom FF…FFh N/A PMBus Data Formats Linear-11 (L11) The L11 data format uses 5-bit two’s complement exponent (N) and 11-bit two’s complement mantissa (Y) to represent a real world decimal value (X). Data Byte High 7 6 5 4 3 2 1 0 Exponent (N) Data Byte Low 7 6 5 4 3 2 1 0 Mantissa (Y) The relation between a real world decimal value (X), N, and Y is: X = Y·2N Linear-16 Unsigned (L16u) The L16u data format uses a fixed exponent (hard-coded to N = -13h) and a 16-bit unsigned integer mantissa (Y) to represent a real world decimal value (X). The relation between a real world decimal value (X), N, and Y is: X = Y·2-13 Linear-16 Signed (L16s) The L16s data format uses a fixed exponent (hard-coded to N = -13h) and a 16-bit two’s complement mantissa (Y) to represent a real world decimal value (X). The relation between a real world decimal value (X), N, and Y is: X = Y·2-13 Bit Field (BIT) An explanation of the Bit Field format is provided in “PMBus Command Detail” on page 29. Custom (CUS) An explanation of the Custom data format is provided in “PMBus Command Detail” on page 29. A combination of Bit Field and integer are common type of Custom data format. ASCII (ASC) A variable length string of text characters in the ASCII data format. FN7558 Rev.6.00 Nov 8, 2017 Page 28 of 88 ZL8800 PMBus Command Detail PAGE (00h) Definition: Selects Controller 0, Controller 1, or both Controller 0 and Controller 1 to receive commands. All commands following this command will be received and acted on by the selected controller or controllers. Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: No Default Value: 00h (Page 0) Units: N/A COMMAND PAGE (00h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value 0 0 0 0 0 BITS 7:4 BITS 3:0 PAGE 0000 0000 0 0000 0001 1 1111 1111 Both FN7558 Rev.6.00 Nov 8, 2017 Page 29 of 88 ZL8800 OPERATION (01h) Definition: Sets Enable, Disable, and VOUT Margin settings. Data values of OPERATION that force margin high or low only take effect when the MGN pin is left open (that is, in the NOMINAL margin state). This command can also be monitored to read the operating state of the device on bits 7:6. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 00h (immediate off) Units: N/A COMMAND OPERATION (01h) Format Bit Field Bit Position 7 6 5 Access R/W R/W R/W Function 4 3 2 1 0 R/W R/W R/W R/W R/W 0 0 0 See Following Table Default Value 0 0 BITS 7:6 BITS 5:4 BITS 3:0 (NOT USED) 00 00 01 00 10 10 10 0 0 0 UNIT ON OR OFF MARGIN STATE 0000 Immediate off (No sequencing) N/A 0000 Soft off (With sequencing) N/A 00 0000 On Nominal 01 0000 On Margin Low 10 0000 On Margin High NOTE: Bit combinations not listed above may cause command errors. FN7558 Rev.6.00 Nov 8, 2017 Page 30 of 88 ZL8800 ON_OFF_CONFIG (02h) Definition: Configures the interpretation and coordination of the OPERATION command and the ENABLE pin (EN). Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 17h (ENABLE pin control, active high, turn off output immediately – no ramp down) Units: N/A COMMAND ON_OFF_CONFIG (02h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 1 1 1 Function See Following Table Default Value BIT NUMBER 7:5 4:2 1 0 0 0 0 1 0 PURPOSE BIT VALUE Not Used 000 Not used. 000 Device starts any time power is present regardless of ENABLE pin or OPERATION command states. Sets the default to either operate any time power is present or for the on/off to be controlled by ENABLE pin, OPERATION command, or when both the Enable pin and OPERATION command are valid. Polarity of the ENABLE pin ENABLE pin action when commanding the unit to turn off MEANING 101 Device starts from the ENABLE pin only. 110 Device starts from the OPERATION command only. 111 Device starts when the ENABLE pin is active and OPERATION “on” command has been sent. 0 Active low (Pull pin low to start the device) 1 Active high (Pull pin high to start the device) 0 Use the programmed ramp down settings 1 Turn off the output immediately CLEAR_FAULTS (03h) Definition: Clears all fault bits in all registers and releases the SALRT pin (if asserted) simultaneously. If a fault condition still exists, the bit will reassert immediately. This command will not restart a device if it has shut down, it will only clear the faults. Paged or Global: Global Data Length in Bytes: 0 Byte Data Format: N/A Type: Write only Protectable: Yes Default Value: N/A Units: N/A STORE_DEFAULT_ALL (11h) Definition: Stores all current PMBus values from the operating memory into the nonvolatile DEFAULT Store memory. To clear the DEFAULT store, perform a RESTORE_FACTORY then STORE_DEFAULT_ALL. To add to the DEFAULT store, perform a RESTORE_DEFAULT_ALL, write commands to be added, then STORE_DEFAULT_ALL. This command should not be used during device operation. The device will be unresponsive for 20ms while storing values. Paged or Global: Global Data Length in Bytes: 0 Data Format: N/A Type: Write only Default Value: N/A Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 31 of 88 ZL8800 RESTORE_DEFAULT_ALL (12h) Definition: Restores PMBus settings from the nonvolatile DEFAULT Store memory into the operating memory. These settings are loaded at power-up if not superseded by settings in USER store. Security level is changed to level 1 following this command. This command should not be used during device operation. The device will be unresponsive for 20ms while storing values. Paged or Global: Global Data Length in Bytes: 0 Data Format: N/A Type: Write only Default Value: N/A Units: N/A STORE_USER_ALL (15h) Definition: Stores all PMBus settings from the operating memory to the nonvolatile USER store memory. To clear the USER store, perform a RESTORE_FACTORY then STORE_USER_ALL. To add to the USER store, perform a RESTORE_USER_ALL, write commands to be added, then STORE_USER_ALL. This command should not be used during device operation. The device will be unresponsive for 20ms while storing values. Paged or Global: Global Data Length in Bytes: 0 Data Format: N/A Type: Write only Default Value: N/A Units: N/A RESTORE_USER_ALL (16h) Definition: Restores all PMBus settings from the USER store memory to the operating memory. Command performed at power-up. Security level is changed to Level 1 following this command. This command should not be used during device operation. The device will be unresponsive for 20ms while storing values. Paged or Global: Global Data Length in Bytes: 0 Data Format: N/A Type: Write only Default Value: N/A Units: N/A VOUT_MODE (20h) Definition: Reports the VOUT mode and provides the exponent used in calculating several VOUT settings. Paged or Global: Global Data Length in Bytes: 1 Data Format: BIT Type: Read only Default Value: 13h (Linear Mode, Exponent = -13) Units: N/A COMMAND VOUT_MODE (20h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 1 1 Function See Following Table Default Value 0 MODE BITS 7:5 BITS 4:0 (PARAMETER) Linear 000 Five-bit, two’s complement exponent for the mantissa delivered as the data bytes for an output voltage related command. FN7558 Rev.6.00 Nov 8, 2017 0 0 1 0 Page 32 of 88 ZL8800 VOUT_COMMAND (21h) Definition: Sets or reports the target output voltage. The integer value is multiplied by 2 raised to the power of -13h. This command cannot be set to be higher than the lowest setting of either VOUT_MAX or 110% of the pin-strap VOUT setting. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear -16 Unsigned Type: R/W Protectable: Yes Default Value: Pin-strap setting Units: Volts Equation: VOUT = VOUT_COMMAND × 2-13 Range: 0 to VOUT_MAX Example: VOUT_COMMAND = 699Ah = 27,034 Target voltage equals 27034 × 2-13 = 3.3V COMMAND VOUT_COMMAND (21h) Format Linear, Unsigned Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value Pin-strap Setting VOUT_CAL_OFFSET (23h) Definition: Applies a fixed offset voltage to the output voltage command value. This command is typically used to calibrate a device in the application circuit. The two bytes are formatted as a two’s complement binary mantissa, used in conjunction with the exponent of -13h. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear -16 Signed Type: R/W Protectable: Yes Default Value: 0000h Units: Volts Equation: VOUT cal offset = VOUT_CAL_OFFSET×2-13 Range: ±3.99V COMMAND VOUT_CAL_OFFSET (23h) Format Linear-16 Signed Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FN7558 Rev.6.00 Nov 8, 2017 Page 33 of 88 ZL8800 VOUT_MAX (24h) Definition: Sets an upper limit on the output voltage the unit can command regardless of any other commands or combinations. This command provides a safeguard against a user accidentally setting the output voltage to a possibly destructive level rather than to be the primary output overprotection. If a VOUT_COMMAND is sent with a value higher than VOUT_MAX, the device will set the output voltage to VOUT_MAX. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear -16 Unsigned Type: R/W Protectable: Yes Default Value: 1.10 x VOUT_COMMAND pin-strap setting Units: Volts Equation: VOUT max = VOUT_MAX × 2-13 Range: 0V to 5.5V COMMAND VOUT_MAX (24h) Format Linear, Unsigned Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value 1.10 x VOUT_COMMAND Pin-strap Setting VOUT_MARGIN_HIGH (25h) Definition: Sets the value of the VOUT during a margin high. This VOUT_MARGIN_HIGH command loads the unit with the voltage to which the output is to be changed when the OPERATION command is set to “Margin High”. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned Type: R/W word Protectable: Yes Default Value: 1.05 x VOUT_COMMAND setting Units: V Equation: VOUT margin high = VOUT_MARGIN_HIGH x 2-13 Range: 0V to VOUT_MAX COMMAND VOUT_MARGIN_HIGH (25h) Format Linear-16 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value FN7558 Rev.6.00 Nov 8, 2017 1.05 x VOUT_COMMAND Page 34 of 88 ZL8800 VOUT_MARGIN_LOW (26h) Definition: Sets the value of the VOUT during a margin low. This VOUT_MARGIN_LOW command loads the unit with the voltage to which the output is to be changed when the OPERATION command is set to “Margin Low”. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned Type: R/W Protectable: Yes Default Value: 0.95 x VOUT_COMMAND pin-strap setting Units: V Equation: VOUT margin low = VOUT_MARGIN_LOW Range: 0V to VOUT_MAX COMMAND VOUT_MARGIN_LOW (26h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value 0.95 x VOUT_COMMAND VOUT_TRANSITION_RATE (27h) Definition: Sets the rate at which the output should change voltage when the device receives an OPERATION command (Margin High, Margin Low) that causes the output voltage to change. The maximum possible positive value of the two data bytes indicates that the device should make the transition as quickly as possible. This commanded rate does not apply when the device is commanded to turn on or to turn off. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: BA00h (1.0V/ms) Units: V/ms Equation: VOUT_TRANSITION_RATE = Y×2N Range: 0.1 to 4V/ms COMMAND VOUT_TRANSITION_RATE (27h) Format Linear Data Format Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 0 1 1 Signed Mantissa, Y 1 0 1 0 0 0 0 0 Page 35 of 88 ZL8800 VOUT_DROOP (28h) Definition: Sets the effective load line (V/I slope) for the rail in which the device is used. It is the rate, in mV/A, at which the output voltage decreases with increasing output current. For devices that are set to sink output current (negative output current), the output voltage continues to increase as the output current is negative. VOUT_DROOP is not needed for 2-phase operation with a single ZL8800. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 0000h (0mV/A) Units: mV/A Equation: VOUT_DROOP = Y×2N Range: 0 to 40mV/A COMMAND VOUT_DROOP (28h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 0 0 0 Signed Mantissa, Y 0 0 0 0 0 0 0 0 0 FREQUENCY_SWITCH (33h) Definition: Sets the switching frequency of the device. Initial default value is defined by a pin-strap and this value can be overridden by writing this command. If an external SYNC is used, this value should be set as close as possible to the external clock value. The output must be disabled when writing this command. Available frequencies are defined by the equation fSW = 16MHz/n where 11 ≤ n ≤ 80 Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: Pin-strap setting Units: kHz Equation: FREQUENCY_SWITCH = Y×2N Range: 200kHz to 1.33MHz COMMAND FREQUENCY_SWITCH (33h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N Signed Mantissa, Y Pin-strapped Value Page 36 of 88 ZL8800 INTERLEAVE (37h) Definition: Configures the phase offset of a device that is sharing a common SYNC clock with other devices. An INTERLEAVE group number and desired phase position are specified. Interleave is used for setting the phase offset in noncurrent sharing devices. For current sharing rails, INTERLEAVE is ignored and DDC_CONFIG is used to configure the phase relationship between current sharing phases. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: Set by pin-strapped PMBus address, page 1 is automatically offset from page 0 Units: N/A COMMAND INTERLEAVE (37h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function See Following Table Default Value 0 0 0 0 0 0 0 0 Four LSBs of SMBus Address Four LSBs of SMBus Address BITS PURPOSE VALUE DESCRIPTION 15:8 Not Used 0 7:4 Group Number 0 to 15 Sets the group number. A value of 0 is interpreted as 16. 3:0 Position of Device 0 to 15 Sets position of the device’s rail within the group. A value of 0 is interpreted as 16. Position 1 will have a 22.5° offset. Not used. IOUT_CAL_GAIN (38h) Definition: Sets the effective impedance across the current-sense circuit to calculate output current at +25°C. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: AA66h (0.3mΩ) Units: mΩ Equation: IOUT_CAL_GAIN = Y×2N COMMAND IOUT_CAL_GAIN (38h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 0 1 0 0 0 1 1 0 Function Default Value Signed Exponent, N 1 FN7558 Rev.6.00 Nov 8, 2017 0 1 0 Signed Mantissa, Y 1 1 0 Page 37 of 88 ZL8800 IOUT_CAL_OFFSET (39h) Definition: Nulls out any offsets in the output current-sensing circuit, and compensates for delayed measurements of current ramp due to Isense blanking time. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 0000h (0A) Units: A Equation: IOUT_CAL_OFFSET = Y×2N COMMAND IOUT_CAL_OFFSET (39h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 0 0 0 Signed Mantissa, Y 0 0 0 0 0 0 0 0 0 VOUT_OV_FAULT_LIMIT (40h) Definition: Sets the VOUT overvoltage fault threshold. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned Type: R/W Protectable: Yes Default Value: 1.15 x VOUT_COMMAND pin-strap setting Units: V Equation: VOUT OV fault limit = VOUT_OV_FAULT_LIMIT×2-13 Range: 0V to 7.99V COMMAND VOUT_OV_FAULT_LIMIT (40h) Format Linear-16 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value FN7558 Rev.6.00 Nov 8, 2017 1.15 x VOUT_COMMAND Page 38 of 88 ZL8800 VOUT_OV_FAULT_RESPONSE (41h) Definition: Configures the VOUT overvoltage fault response. Note that the device cannot be set to ignore this fault mode. The retry time is the time between restart attempts. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Shut down immediately, no retries) Units: Retry time = 70ms COMMAND VOUT_OV_FAULT_RESPONSE (41h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 1 0 FIELD NAME 0 0 VALUE 00-01 Response Behavior—the device: • Pulls SALRT low 7:6 0 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the device is restarted. 001-110 Not used. 5:3 Retry Setting 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. VOUT_UV_FAULT_LIMIT (44h) Definition: Sets the VOUT undervoltage fault threshold. This fault is masked during ramp, before Power-good is asserted, or when the device is disabled. VOUT_UV_FAULT_LIMIT must be set to a value below POWER_GOOD_ON. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned Type: R/W Protectable: Yes Default Value: 0.85 x VOUT_COMMAND pin-strap setting Units: V Equation: VOUT UV fault limit = VOUT_UV_FAULT_LIMIT×2-13 Range: 0V to 7.99V COMMAND VOUT_UV_FAULT_LIMIT (44h) Format Linear-16 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value FN7558 Rev.6.00 Nov 8, 2017 0.85 x VOUT_COMMAND Page 39 of 88 ZL8800 VOUT_UV_FAULT_RESPONSE (45h) Definition: Configures the VOUT undervoltage fault response. Note that VOUT UV faults can only occur after Power-good (PG) has been asserted. Under some circumstances, this will cause the output to stay fixed below the Power-good threshold indefinitely. If this behavior is undesired, use setting 80h. The retry time is the time between restart attempts. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Shut down immediately, no retries) Units: Retry time unit = 70ms COMMAND VOUT_UV_FAULT_RESPONSE (45h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 1 0 0 0 0 0 Function See Following Table Default Value BIT FIELD NAME 0 VALUE 00-01 Response Behavior—the device: • Pulls SALRT low 7:6 0 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Not used. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 Retry Setting 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the ENABLE pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. IOUT_OC_FAULT_LIMIT (46h) Definition: Sets the IOUT peak overcurrent fault threshold. This limit is applied to current measurement samples taken after the Current Sense Blanking Time has expired. A fault occurs after this limit is exceeded for the number of consecutive samples as defined in ISENSE_CONFIG. This feature shares the OC fault bit operation (in STATUS_IOUT) and OC fault response with IOUT_AVG_OC_FAULT_LIMIT. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: DA80h (20A) Units: A Equation: IOUT_OC_FAULT_LIMIT = Y×2N Range: -100A to 100A COMMAND IOUT_OC_FAULT_LIMIT (46h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 0 1 0 1 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 0 1 Signed Mantissa, Y 0 0 0 Page 40 of 88 ZL8800 IOUT_UC_FAULT_LIMIT (4Bh) Definition: Sets the IOUT valley undercurrent fault threshold. This limit is applied to current measurement samples taken after the Current Sense Blanking Time has expired. A fault occurs after this limit is exceeded for the number of consecutive sample as defined in ISENSE_CONFIG. This feature shares the UC fault bit operation (in STATUS_IOUT) and UC fault response with IOUT_AVG_UC_FAULT_LIMIT. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: -20A (DD80h) Units: A Equation: IOUT_OC_FAULT_LIMIT = Y×2N Range: -100A to 100A COMMAND IOUT_UC_FAULT_LIMIT (4Bh) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Signed Exponent, N Signed Mantissa, Y Default Value -1 x IOUT_OC_FAULT_LIMIT OT_FAULT_LIMIT (4Fh) Definition: Sets the temperature at which the device should indicate an over-temperature fault. Note that the temperature must drop below OT_WARN_LIMIT to clear this fault. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: EBE8h (+125°C) Units: Celsius Equation: OT_FAULT_LIMIT = Y×2N Range: 0 to +175 COMMAND OT_FAULT_LIMIT (4Fh) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 1 0 Signed Mantissa, Y 1 0 1 1 1 1 1 0 Page 41 of 88 ZL8800 OT_FAULT_RESPONSE (50h) Definition: Instructs the device what action to take in response to an over-temperature fault. The retry time is the time between restart attempts. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Shut down immediately, no retries) Units: Retry time unit = 210ms COMMAND OT_FAULT_RESPONSE (50h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 1 0 0 0 0 0 Function See Following Table Default Value BIT 7:6 FIELD NAME VALUE Response Behavior—the device: • Pulls SALRT low 00-01 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. Retry Setting 0 0 DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. OT_WARN_LIMIT (51h) Definition: Sets the temperature at which the device should indicate an over-temperature warning alarm. In response to the OT_WARN_LIMIT being exceeded, the device sets the TEMPERATURE bit in STATUS_WORD, sets the OT_WARNING bit in STATUS_TEMPERATURE, and notifies the host. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: EB70h (+110°C) Units: Celsius Equation: OT_WARN_LIMIT = Y×2N Range: 0 to 175 COMMAND OT_WARN_LIMIT (51h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 0 1 1 0 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 1 0 Signed Mantissa, Y 1 1 1 Page 42 of 88 ZL8800 UT_WARN_LIMIT (52h) Definition: Sets the temperature at which the device should indicate an under-temperature Warning alarm. In response to the UT_WARN_LIMIT being exceeded, the device sets the TEMPERATURE bit in STATUS_WORD, sets the UT_WARNING bit in STATUS_TEMPERATURE, and notifies the host. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: DC40h (-30°C) Units: Celsius Equation: UT_WARN_LIMIT = Y×2N Range: -55 to +25 COMMAND UT_WARN_LIMIT (52h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 1 0 0 0 0 0 0 0 Function Default Value Signed Exponent, N 1 1 0 1 Signed Mantissa, Y 1 0 0 UT_FAULT_LIMIT (53h) Definition: Sets the temperature, in degrees Celsius, of the unit at which it should indicate an under-temperature fault. Note that the temperature must rise above UT_WARN_LIMIT to clear this fault. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: E530h (-45°C) Units: Celsius Equation: UT_FAULT_LIMIT = Y×2N Range: -55 to +25 COMMAND UT_FAULT_LIMIT (53h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 1 0 Signed Mantissa, Y 0 1 0 1 0 0 1 1 Page 43 of 88 ZL8800 UT_FAULT_RESPONSE (54h) Definition: Configures the under-temperature fault response as defined by the table below. The retry time is the time between restart attempts. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Shut down immediately, no retries) Units: Retry time unit = 210ms COMMAND UT_FAULT_RESPONSE (54h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 1 0 FIELD NAME 0 0 VALUE 00-01 Response Behavior—the device: • Pulls SALRT low 7:6 0 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the device is restarted. 001-110 Not used. 5:3 Retry Setting 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. VIN_OV_FAULT_LIMIT (55h) Definition: Sets the VIN overvoltage fault threshold. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11. Type: R/W Protectable: Yes Default Value: D380h (14V) Units: V Equation: VIN_OV_FAULT_LIMIT = Y×2N Range: 0 to 19V COMMAND VIN_OV_FAULT_LIMIT (55h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 1 0 1 1 1 0 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 0 Signed Mantissa, Y 0 0 0 Page 44 of 88 ZL8800 VIN_OV_FAULT_RESPONSE (56h) Definition: Configures the VIN overvoltage fault response as defined by the table below. The retry time is the time between restart attempts. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate shutdown, no retry) Units: Retry time unit = 70ms COMMAND VIN_OV_FAULT_RESPONSE (56h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 1 0 FIELD NAME 0 0 VALUE 00-01 Response Behavior—the device: • Pulls SALRT low 7:6 0 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 Retry Setting 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. VIN_OV_WARN_LIMIT (57h) Definition: Sets the VIN overvoltage warning threshold as defined by the table below. In response to the OV_WARN_LIMIT being exceeded, the device sets the NONE OF THE ABOVE and INPUT bits in STATUS_WORD, Sets the VIN_OV_WARNING bit in STATUS_INPUT, and notifies the host. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: D360h (13.5V) Units: V Equation: VIN_OV_FAULT_LIMIT = Y×2N Range: 0 to 19V COMMAND VIN_OV_WARN_LIMIT (57h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 0 1 Signed Mantissa, Y 0 0 1 1 0 1 1 0 Page 45 of 88 ZL8800 VIN_UV_WARN_LIMIT (58h) Definition: Sets the VIN undervoltage warning threshold. If a VIN_UV_FAULT occurs, the input voltage must rise above VIN_UV_WARN_LIMIT to clear the fault, which provides hysteresis to the fault threshold. In response to the UV_WARN_LIMIT being exceeded, the device sets the NONE OF THE ABOVE and INPUT bits in STATUS_WORD, sets the VIN_UV_WARNING bit in STATUS_INPUT, and notifies the host. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 1.03 x VIN_UV_FAULT_LIMIT pin-strap setting Units: V Equation: VIN_UV_WARN_LIMIT = Y×2N Range: 0 to 19V COMMAND VIN_UV_WARN_LIMIT (58h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Signed Exponent, N Signed Mantissa, Y Default Value 1.03 x VIN_UV_FAULT_LIMIT VIN_UV_FAULT_LIMIT (59h) Definition: Sets the VIN undervoltage fault threshold. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: Pin-strap setting Units: V Equation: VIN_UV_FAULT_LIMIT = Y×2N Range: 0 to 19V COMMAND VIN_UV_FAULT_LIMIT (59h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N Signed Mantissa, Y Pin-Strapped Value Page 46 of 88 ZL8800 VIN_UV_FAULT_RESPONSE (5Ah) Definition: Configures the VIN undervoltage fault response as defined by the table below. The retry time is the time between restart attempts. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate shutdown, no retries) Units: Retry time unit = 70ms COMMAND VIN_UV_FAULT_RESPONSE (5Ah) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 1 0 FIELD NAME 0 0 VALUE 00-01 Response Behavior—the device: • Pulls SALRT low 7:6 0 • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. DESCRIPTION Not used. 10 Disable and Retry according to the setting in Bits [5:3]. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 Retry Setting 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. POWER_GOOD_ON (5Eh) Definition: Sets the voltage threshold for Power-good indication. Power-good asserts when the output voltage exceeds POWER_GOOD_ON and de-asserts when the output voltage is less than VOUT_UV_FAULT_LIMIT. POWER_GOOD_ON must be set to a value above VOUT_UV_FAULT_LIMIT. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned. Type: R/W Protectable: Yes Default Value: 0.9 x VOUT_COMMAND pin-strap setting Units: V COMMAND POWER_GOOD_ON (5Eh) Format Linear, Unsigned Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Default Value FN7558 Rev.6.00 Nov 8, 2017 0.9 x VOUT_COMMAND Page 47 of 88 ZL8800 TON_DELAY (60h) Definition: Sets the delay time from when the device is enabled to the start of VOUT rise. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: CA80h, 5ms Units: ms Equation: TON_DELAY = Y×2N Range: 0 to 5 seconds. The minimum delay time is 3ms. Values below 3ms will result in a delay time of 3ms. COMMAND TON_DELAY (60h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Signed Exponent, N Default Value 1 1 0 0 Signed Mantissa, Y 1 0 1 0 1 0 0 0 TON_RISE (61h) Definition: Sets the rise time of VOUT after ENABLE and TON_DELAY. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11. Type: R/W Protectable: Yes Default Value: CA80h, 5ms Units: ms Equation: TON_RISE = Y×2N Range: 1 to 100ms. The minimum rise time is 1ms. Values below 1ms will default to 1ms. Short rise times may cause excessive input and output currents to flow, thus triggering overcurrent faults at start-up. COMMAND TON_RISE (61h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N 1 1 0 0 Signed Mantissa, Y 1 0 1 0 1 0 0 0 Page 48 of 88 ZL8800 TOFF_DELAY (64h) Definition: Sets the delay time from DISABLE to start of VOUT fall. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 0000h, 0ms Units: ms Equation: TON_DELAY = Y×2N Range: 0 to 5 seconds. Values less than 0.5ms will set the device to immediate off (no TOFF_FALL ramp down). COMMAND TOFF_DELAY (64h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Signed Exponent, N Default Value 0 0 0 0 Signed Mantissa, Y 0 0 0 0 0 0 0 0 TOFF_FALL (65h) Definition: Sets the fall time for VOUT after DISABLE and TOFF_DELAY. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 5ms (CA80h) Units: ms Equation: TOFF_FALL = Y×2N Range: 0 to 100ms. Although values can be set below 0.50ms, fall time accuracy cannot be guaranteed. In addition, short fall times may cause excessive negative output current to flow, thus triggering undercurrent faults at shut-down. COMMAND TOFF_FALL (65h) Format Linear, Two’s Complement Binary Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Default Value Signed Exponent, N Signed Mantissa, Y 1 x TON_RISE STATUS_BYTE (78h) Definition: Returns two bytes of information with a summary of the unit’s fault condition. Based on the information in these bytes, the host can get more information by reading the appropriate status registers. The low byte of the STATUS_WORD is the same register as the STATUS_BYTE (78h) command. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 49 of 88 ZL8800 STATUS_WORD (79h) Definition: Returns two bytes of information with a summary of the unit’s fault condition. Based on the information in these bytes, the host can get more information by reading the appropriate status registers. The low byte of the STATUS_WORD is the same register as the STATUS_BYTE (78h) command. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: Read only Protectable: No Default Value: 0000h Units: N/A COMMAND STATUS_WORD (79h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R 0 0 0 0 0 0 0 Function See Following Table Default Value 0 0 0 0 0 0 0 0 0 BIT NUMBER STATUS BIT NAME MEANING 15 VOUT An output voltage fault or warning has occurred. 14 IOUT An output current or output power fault or warning has occurred. 13 INPUT An input voltage, input current, or input power fault or warning has occurred. 12 MFG_SPECIFIC 11 POWER_GOOD # 10 NOT USED 9 OTHER 8 UNKNOWN A fault type not given in Bits 15:1 of the STATUS_WORD has been detected. 7 BUSY A fault was declared because the device was busy and unable to respond. 6 OFF This bit is asserted if the unit is not providing power to the output, regardless of the reason, including simply not being enabled. 5 VOUT_OV_FAULT An output overvoltage fault has occurred. 4 IOUT_OC_FAULT An output overcurrent fault has occurred. 3 VIN_UV_FAULT An input undervoltage fault has occurred. 2 TEMPERATURE A temperature fault or warning has occurred. 1 CML 0 NONE OF THE ABOVE A manufacturer specific fault or warning has occurred. The POWER_GOOD signal is negated if present (Note 17). Not used. A bit in STATUS_OTHER is set. A communications, memory, or logic fault has occurred. A fault or warning not listed in Bits 7:1 has occurred. NOTE: 17. If the POWER_GOOD# bit is set, this indicates that the POWER_GOOD signal, if present, is signaling that the output power is not good. FN7558 Rev.6.00 Nov 8, 2017 Page 50 of 88 ZL8800 STATUS_VOUT (7Ah) Definition: Returns one data byte with the status of the output voltage. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_VOUT (7Ah) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function See Following Table Default Value 0 0 0 0 0 BIT NUMBER STATUS BIT NAME MEANING 7 VOUT_OV_FAULT 6 VOUT_OV_WARNING Indicates an output overvoltage warning. 5 VOUT_UV_WARNING Indicates an output undervoltage warning. 4 VOUT_UV_FAULT 3:0 Not Used Indicates an output overvoltage fault. Indicates an output undervoltage fault. Not used. STATUS_IOUT (7Bh) Definition: Returns one data byte with the status of the output current. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_IOUT (7Bh) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function Default Value See Following Table 0 0 0 0 0 BIT NUMBER STATUS BIT NAME 7 IOUT_OC_FAULT 6 IOUT_OC_LV_FAULT An output overcurrent and low voltage fault has occurred. 5 IOUT_OC_WARNING An output overcurrent warning has occurred. 4 IOUT_UC_FAULT An output under current fault has occurred. 3:0 Not Used FN7558 Rev.6.00 Nov 8, 2017 MEANING An output overcurrent fault has occurred. Not used. Page 51 of 88 ZL8800 STATUS_INPUT (7Ch) Definition: Returns input voltage and input current status information. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_INPUT (7Ch) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function Default Value See Following Table 0 0 0 0 0 BIT NUMBER STATUS BIT NAME MEANING 7 VIN_OV_FAULT 6 VIN_OV_WARNING An input overvoltage warning has occurred. 5 VIN_UV_WARNING An input undervoltage warning has occurred. 4 VIN_UV_FAULT 3:0 Not Used An input overvoltage fault has occurred. An input undervoltage fault has occurred. Not used. STATUS_TEMPERATURE (7Dh) Definition: Returns one byte of information with a summary of any temperature related faults or warnings. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_TEMP (7Dh) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function Default Value See Following Table 0 0 0 0 0 BIT NUMBER STATUS BIT NAME 7 OT_FAULT 6 OT_WARNING An over-temperature warning has occurred. 5 UT_WARNING An under-temperature warning has occurred. 4 UT_FAULT An under-temperature fault has occurred. 3:0 Not Used Not used. FN7558 Rev.6.00 Nov 8, 2017 MEANING An over-temperature fault has occurred. Page 52 of 88 ZL8800 STATUS_CML (7Eh) Definition: Returns one byte of information with a summary of any Communications, Logic, and/or Memory errors. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_CML (7Eh) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function Default Value See Following Table 0 0 0 0 BIT NUMBER 0 MEANING 7 Invalid or unsupported PMBus command was received. 6 The PMBus command was sent with invalid or unsupported data. 5 A packet error was detected in the PMBus command. 4:2 Not used. 1 A PMBus command tried to write to a read only or protected command, or a communication fault other than the ones listed in this table has occurred. 0 Not used. FN7558 Rev.6.00 Nov 8, 2017 Page 53 of 88 ZL8800 STATUS_MFR_SPECIFIC (80h) Definition: Returns one byte of information providing the status of the device’s voltage monitoring and clock synchronization faults. Note: The VMON OV/UV warnings are set at ±10% of the VMON_XX_FAULT commands. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: Read only Protectable: No Default Value: 00h Units: N/A COMMAND STATUS_MFR_SPECIFIC (80h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R R R R R R R R 0 0 0 Function See Following Table Default Value 0 0 0 0 0 BIT FIELD NAME MEANING 7:6 Not Used 5 VMON UV Warning The VMON voltage has dropped below the VMON UV warning limit which is automatically set to 10% above MFR_VMON_UV_FAULT_LIMIT (1.1 * MFR_VMON_UV_FAULT_LIMIT). 4 VMON OV Warning The VMON voltage has risen above the VMON OV warning limit which is automatically set to 10% below MFR_VMON_OV_FAULT_LIMIT (0.9 * MFR_VMON_UV_FAULT_LIMIT). 3 External Switching Period Fault 2 Not Used 1 VMON UV Fault The VMON voltage has dropped below MFR_VMON_UV_FAULT_LIMIT. 0 VMON OV Fault The VMON voltage has risen above MFR_VMON_OV_FAULT_LIMIT. Not used. Loss of external clock synchronization has occurred. Not used. READ_VIN (88h) Definition: Returns the input voltage reading. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: V Equation: READ_VIN = Y×2N Range: N/A COMMAND READ_VIN (88h) Format Linear-11 Bit Position 15 Access R Function Default Value 14 13 12 11 10 9 8 7 R R R R R R R R Signed Exponent, N N/A FN7558 Rev.6.00 Nov 8, 2017 N/A N/A N/A 6 5 4 3 2 1 0 R R R R R R R N/A N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A Page 54 of 88 ZL8800 READ_IIN (89h) Definition: Returns the input current reading. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: A Equation: READ_IIN = Y×2N Range: N/A COMMAND READ_IIN (89h) Format Linear-11 Bit Position 15 Access R Function Default Value 14 13 12 11 10 9 8 7 R R R R R R R R Signed Exponent, N N/A N/A N/A 6 5 4 3 2 1 0 R R R R R R R N/A N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A N/A READ_VOUT (8Bh) Definition: Returns the output voltage reading. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-16 Unsigned Type: Read only Protectable: No Default Value: N/A Equation: READ_VOUT = READ_VOUT × 2-13 Units: V COMMAND READ_VOUT (8Bh) Format Linear-16 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R Default Value N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A READ_IOUT (8Ch) Definition: Returns the output current reading. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: A Equation: READ_IOUT = Y×2N Range: N/A COMMAND READ_IOUT (8Ch) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R N/A N/A N/A N/A Function Default Value Signed Exponent, N N/A FN7558 Rev.6.00 Nov 8, 2017 N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A Page 55 of 88 ZL8800 READ_TEMPERATURE_1 (8Dh) Definition: Returns the temperature reading internal to the device. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: ˚C Equation: READ_TEMPERATURE_1 = Y×2N Range: N/A COMMAND READ_INTERNAL_TEMP (8Dh) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R N/A N/A N/A N/A Function Default Value Signed Exponent, N N/A N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A READ_TEMPERATURE_2 (8Eh) Definition: Returns the temperature reading from the external temperature device connected to XTEMP. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: ˚C Equation: READ_TEMPERATURE_2 = Y×2N Range: N/A COMMAND READ_EXTERNAL_TEMP (8Eh) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R N/A N/A N/A N/A Function Default Value Signed Exponent, N N/A FN7558 Rev.6.00 Nov 8, 2017 N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A Page 56 of 88 ZL8800 READ_DUTY_CYCLE (94h) Definition: Reports the actual duty cycle of the converter during the enable state. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: % Equation: READ_DUTY_CYCLE = Y×2N Range: 0 to100% COMMAND READ_DUTY_CYCLE (94h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R Function Default Value Signed Exponent, N N/A N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A READ_FREQUENCY (95h) Definition: Reports the actual switching frequency of the converter during the enable state. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Default Value: N/A Units: kHz Equation: READ_FREQUENCY = Y×2N Range: N/A COMMAND READ_FREQUENCY (95h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R R R R R R R R R R R R N/A N/A N/A N/A Function Default Value Signed Exponent, N N/A N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A MFR_ID (99h) Definition: Sets a user defined identification string not to exceed 32 bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128 bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 57 of 88 ZL8800 MFR_MODEL (9Ah) Definition: Sets a user defined model string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A MFR_REVISION (9Bh) Definition: Sets a user defined revision string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A MFR_LOCATION (9Ch) Definition: Sets a user defined location identifier string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A MFR_DATE (9Dh) Definition: Sets a user defined date string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 58 of 88 ZL8800 MFR_SERIAL (9Eh) Definition: Sets a user defined serialized identifier string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes. This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A IC_DEVICE_ID (ADh) Definition: Reports device identification information. Paged or Global: Global Data Length in Bytes: 4 Data Format: CUS Type: Block Read Protectable: No Default Value: 49A02400h Units: N/A COMMAND IC_DEVICE_ID (ADh) Format Block Read Byte Position 3 2 1 0 Function MFR code ID High Byte ID Low Byte Reserved Default Value 49h A0h 24h 00h IC_DEVICE_REV (AEh) Definition: Reports device revision information. Paged or Global: Global Data Length in Bytes: 4 Data Format: CUS Type: Block Read Protectable: No Default Value: 00000000h Units: N/A COMMAND IC_DEVICE_REV (AEh) Format Block Read Byte Position 3 2 1 0 Function Firmware Major Firmware Minor Factory Configuration Reserved Default Value 00h 00h 00h 00h FN7558 Rev.6.00 Nov 8, 2017 Page 59 of 88 ZL8800 USER_DATA_00 (B0h) Definition: Sets a user defined data string not to exceed 32bytes. The sum total of characters in MFR_ID, MFR_MODEL, MFR_REVISION, MFR_LOCATION, MFR_DATE, MFR_SERIAL, and USER_DATA_00 plus one byte per command cannot exceed 128bytes This limitation includes multiple writes of this command before a STORE command. To clear multiple writes, perform a RESTORE, write this command, then perform a STORE/RESTORE. Paged or Global: Global Data Length in Bytes: User defined Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: Yes Default Value: Null Units: N/A DEADTIME_MAX (BFh) Definition: Sets the maximum dead time value for the PWMH and PWML outputs. This limit applies during frozen or adaptive dead time algorithm modes (see DEADTIME_CONFIG). Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 3838h (56ns/56ns) Units: ns Range: 0 to 60ns Reference: N/A COMMAND DEADTIME_MAX (BFh) Format Bit Field/Linear-7 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 1 1 1 0 0 0 Function Default Value See Following Table 0 0 1 1 1 0 0 0 0 BITS PURPOSE VALUE 15 Not Used 0 Not used. 14:8 Sets the maximum HIGH to LOW dead time H Limits the maximum allowed HIGH to LOW dead time when using the adaptive dead time algorithm. dead time = Hns (signed) 7 Not Used 0 Not used. 6:0 Sets the maximum LOW to HIGH dead time L Limits the maximum allowed LOW to HIGH dead time when using the adaptive dead time algorithm. dead time = Lns (signed) FN7558 Rev.6.00 Nov 8, 2017 DESCRIPTION Page 60 of 88 ZL8800 ISENSE_CONFIG (D0h) Definition: Configures current sense circuitry. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W word Protectable: Yes Default Value: 4204h (256ns, 5 counts, downslope, low range) Units: N/A Range: N/A COMMAND ISENSE_CONFIG (D0h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 1 0 0 0 0 1 0 0 0 0 1 0 0 Function See Following Table Default Value BIT 15:11 FIELD NAME Current-Sense Blanking Time FN7558 Rev.6.00 Nov 8, 2017 VALUE SETTING 00000 0 00001 32 00010 64 00011 96 00100 128 00101 160 00110 192 00111 224 01000 256 01001 288 01010 320 01011 352 01100 384 01101 416 01110 448 01111 480 10000 512 10001 544 10010 576 10011 608 10100 640 10101 672 10110 704 10111 736 11000 768 11001 800 11010 832 0 0 DESCRIPTION Sets the blanking time current-sense blanking time in increments of 32ns Page 61 of 88 ZL8800 BIT 10:8 7:4 3:2 1:0 FIELD NAME Current-Sense Fault Count Not Used Current-Sense Control Current-Sense Range FN7558 Rev.6.00 Nov 8, 2017 VALUE SETTING 000 1 001 3 010 5 011 7 100 9 101 11 110 13 111 15 0000 Not Used 00 Not Used 01 DCR (Down Slope) 10 DCR (Up Slope) 11 Not Used 00 Low Range 01 Medium Range 10 High Range 11 Not Used DESCRIPTION Sets the number of consecutive overcurrent (OC) or undercurrent (UC) events required for a fault. An event can occur once during each switching cycle. For example, if 5 is selected, an OC or UC event must occur for 5 consecutive switching cycles, resulting in a delay of at least 5 switching periods. Not used Selection of current-sensing method (DCR based: VOUT referenced) Low Range ±25mV, Medium Range ±35mV, High Range ±50mV Page 62 of 88 ZL8800 USER_CONFIG (D1h) Definition: Configures several user-level features. This command should be saved immediately after being written to the desired user or default store. This is recommended when written as an individual command or as part of a series of commands in a configuration file or script. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 0402h Units: N/A COMMAND USER_CONFIG (D1h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 1 0 Function See Following Table Default Value BIT 0 FIELD NAME 15:11 Minimum Duty Cycle 0 0 0 0 1 0 0 0 VALUE SETTING DESCRIPTION 00000 0-31d Sets the minimum duty-cycle to 2 x (VALUE + 1)/512. Must be enabled with Bit 7 0 Disable 0 = PWML and PWMH are direct drive to MOSFET driver 1 Enable 1 = PWML is DRMOS Enable, PWMH is DRMOS PWM input 10 Enable DR MOS 9:8 Not Used 0 Not Used 7 Minimum Duty Cycle Control 0 Disable 1 Enable 6 Not Used 0 Not Used 5 VSET Select 0 VSET0 0 = Uses only VSET0 to set Pin-strapped output voltage 1 VSET1 1 = Uses only VSET1 to set Pin-strapped output voltage 4 Margin Ratio Enable 0 Disable 1 Enable 3 PWML disabled state 0 Low when disabled 1 High when disabled 2 Power-good Configuration 0 Open Drain 1 Push-pull 1 XTEMP Enable 0 Disable 1 Enable 0 XTEMP Fault Select 0 Disable 1 Enable FN7558 Rev.6.00 Nov 8, 2017 Not used. Control for minimum duty cycle Not used. Use VOUT_MARGIN_RATIO to program margin values when enabled PWML is low (off) when device is disabled (Bit 3 set to 0), or high (on) when device is disabled (Bit 3 set to 1) 0 = PG is open-drain output 1 = PG is push-pull output Enables external temperature sensor Selects external temperature sensor to determine temperature faults Page 63 of 88 ZL8800 IIN_CAL_GAIN (D2h) Definition: Sets the effective impedance across the current sense circuit for use in calculating input current at +25°C. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11. Type: R/W Protectable: Yes Default Value: C200h (2mΩ) Units: mΩ Equation: IIN_CAL_GAIN = Y×2N COMMAND IIN_CAL_GAIN (D2h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Signed Exponent, N Default Value 1 1 0 Signed Mantissa, Y 0 0 0 1 0 0 0 0 0 DDC_CONFIG (D3h) Definition: Configures DDC addressing and current sharing. To operate as a 2-phase controller, set both phases to the same Rail ID, set Phases in Rail to 2, then set each phase ID sequentially as 0 and 1. The ZL8800 will automatically equally offset the phases in the rail. Phase spreading is done automatically as part of the DDC_CONFIG command, the INTERLEAVE command only applies to non-current sharing rails. The ZL8800 can operate as a 2-phase controller, current sharing between its two internal phases, but does not support current sharing with other ZL8800 devices or phases. NOTE: The output MUST be connected to VSEN0P and VSEN0N when operating as a 2-phase controller. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: PMBus address pin-strap dependent. Units: N/A COMMAND DDC_CONFIG (D3h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function See Following Table Default Value 0 0 0 Lower 5 bits of device address 0 BIT FIELD NAME VALUE SETTING 15:13 Phase ID 0 to 7 0 Sets the output's phase position within the rail 12:8 Rail ID 0 to 31d 0 Identifies the device as part of a current sharing rail (shared output) 7:3 Not Used 00 00 Not used. 2:0 Phases In Rail 0 to 7 0 Identifies the number of phases on the same rail (+1) FN7558 Rev.6.00 Nov 8, 2017 DESCRIPTION Page 64 of 88 ZL8800 POWER_GOOD_DELAY (D4h) Definition: Sets the delay applied between the output exceeding the PG threshold (POWER_GOOD_ON) and asserting the PG pin. The delay time can range from 0ms up to 500s, in steps of 125ns. A 1ms minimum configured value is recommended to apply proper debounce to this signal. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: BA00h, 1ms Units: ms Equation: POWER_GOOD_DELAY = Y×2N Range: 0 to 5 seconds COMMAND POWER_GOOD_DELAY (D4h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 1 0 1 1 Signed Mantissa, Y 1 0 1 0 0 0 0 0 INDUCTOR (D6h) Definition: Informs the device of the circuit’s inductor value. This is used in adaptive algorithm calculations relating to the inductor ripple current. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11. Type: R/W Protectable: Yes Default Value: B23Dh (0.56µH) Units: µH Equation: INDUCTOR = Y×2N Range: 0 to 100µH COMMAND INDUCTOR (D6h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 1 1 0 1 Function Default Value Signed Exponent, N 1 FN7558 Rev.6.00 Nov 8, 2017 0 1 1 Signed Mantissa, Y 0 0 1 0 0 0 1 1 Page 65 of 88 ZL8800 VOUT_MARGIN RATIO (D7h) Definition: Percentage to set MARGIN_HIGH and MARGIN_LOW above and below VOUT_COMMAND when the feature is enabled by USER_CONFIG. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 5 (CA80h) Units: % Equation: VOUT_MARGIN_RATIO = Y×2N Range: 0 to 50% COMMAND VOUT_MARGIN_RATIO (D7h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 1 1 0 0 Signed Mantissa, Y 1 0 1 0 1 0 0 0 OVUV_CONFIG (D8h) Definition: Configures the output voltage OV and UV fault detection feature Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 00h Units: N/A COMMAND OVUV_CONFIG (D8h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function Default Value BITS See Following Table 0 0 0 PURPOSE 0 0 VALUE DESCRIPTION Controls how an OV fault response shutdown sets the output driver state 0 An OV fault does not enable low-side power device 1 An OV fault enables the low-side power device 6:4 Not Used 0 Not used. 3:0 Defines the number of consecutive limit violations required to declare an OV or UV fault N N+1 consecutive OV or UV violations initiate a fault response 7 FN7558 Rev.6.00 Nov 8, 2017 Page 66 of 88 ZL8800 XTEMP_SCALE (D9h) Definition: Sets a scalar value that is used for calibrating the external temperature. The constant is applied in the equation below to produce the read value of XTEMP through the PMBus command READ_EXTERNAL_TEMP. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: BA00h (1.0) Units: 1/°C  1 Equation: READ_TEMPERATURE_2   ExternalTemperature    XTEMP_OFFSET XTEMP_SCALE   Range: 0.1 to 10 COMMAND XTEMP_SCALE (D9h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 1 0 1 1 Signed Mantissa, Y 1 0 1 0 0 0 0 0 XTEMP_OFFSET (DAh) Definition: Sets an offset value that is used for calibrating the external temperature. The constant is applied in the equation below to produce the read value of XTEMP through the PMBus command READ_EXTERNAL_TEMP. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11. Type: R/W Protectable: Yes Default Value: 0000h (0) Units: °C  1 Equation: READ_TEMPE RATURE_2   ExternalTe mperature    XTEMP_OFFS ET XTEMP_SCAL E   Range: -100 to 100 COMMAND XTEMP_OFFSET (DAh) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 0 FN7558 Rev.6.00 Nov 8, 2017 0 0 0 Signed Mantissa, Y 0 0 0 0 0 0 0 0 Page 67 of 88 ZL8800 TEMPCO_CONFIG (DCh) Definition: Configures the correction factor and temperature measurement source when performing temperature coefficient correction for current sense. TEMPCO_CONFIG values are applied as negative correction to a positive temperature coefficient. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 27h (3900ppm/°C) Equation: To determine the hex value of the Tempco Correction factor (TC) for current scale of a power stage current sensing, first determine the temperature coefficient of resistance for the sensing element, α. This is calculated with the equation: RREF  R  RREF (TREF  T ) where: R = Sensing element resistance at temperature “T” RREF = Sensing element resistance at reference temperature TREF α = Temperature coefficient of resistance for the sensing element material T = Temperature measured by temperature sensor, in degrees Celsius TREF = Reference temperature that α is specified at for the sensing element material After α is determined, convert the value in units of 100ppm/°C. This value is then converted to a hex value with the following equation: TC   106 100 Typical Values: Copper = 3900ppm/˚C (27h), silicon = 4800ppm/˚C (30h) Range: 0 to 6300ppm/˚C COMMAND TEMPCO_CONFIG (DCh) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 1 1 1 Function See Following Table Default Value BITS 0 0 0 0 PURPOSE VALUE Selects the temp sensor source for tempco correction 0 Selects the internal temperature sensor 1 Selects the XTEMP pin for temperature measurements (2N3904 Junction). Note that XTEMP must be enabled in USER_CONFIG, bit 1. TC RSEN (DCR) = IOUT_CAL_GAIN x (1 + TC x (T-25)) where RSEN = resistance of sense element 7 6:0 1 Sets the tempco correction in units of 100ppm/˚C for IOUT_CAL_GAIN FN7558 Rev.6.00 Nov 8, 2017 DESCRIPTION Page 68 of 88 ZL8800 DEADTIME (DDh) Definition: Sets the nonoverlap between PWM transitions using a 2-byte data field. The most significant byte controls the high-side to low-side dead time value as a single two’s-complement signed value in units of ns. The least-significant byte controls the low-side to high-side dead time value. Positive values imply a non-overlap of the FET drive on-times. Negative values imply an overlap of the FET drive on-times. The device will operate at the dead time values written to this command when adaptive dead time is disabled, between the minimum dead time specified in DEADTIME_CONFIG and the maximum dead time specified in DEADTIME_MAX. When switching from adaptive dead time mode to frozen mode (by writing to Bit 15 of DEADTIME_CONFIG) the frozen dead time will be whatever the last dead time was before the device switches to frozen dead time mode. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Two 2’s complement bytes Type: R/W Protectable: Yes Default Value: 1010h (16ns/16ns) Units: ns Range: -15ns to 60ns COMMAND DEADTIME (DDh) Format Linear-8 Signed Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Default Value High to low-side dead time 8-bit two's complement signed Low to high-side dead time 8-bit two's complement signed 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 DEADTIME_CONFIG (DEh) Definition: Configures the adaptive dead time optimization mode. Also sets the minimum dead time value for the adaptive dead time mode range. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 0808h (Adaptive dead time control, 8ns/8ns minimum dead time) Units: N/A COMMAND DEADTIME_CONFIG (DEh) Format Bit Field/Linear-7 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 1 0 0 0 Function Default Value See Following Table 0 BITS 15 14:8 7 6:0 0 0 0 1 PURPOSE Sets the HIGH to LOW transition dead time mode Sets the minimum HIGH to LOW dead time Sets the LOW to HIGH transition dead time mode Sets the minimum LOW to HIGH dead time FN7558 Rev.6.00 Nov 8, 2017 0 0 0 VALUE 0 DESCRIPTION 0 Adaptive HIGH to LOW dead time control 1 Freezes the HIGH to LOW dead time 0-126d Limits the minimum allowed HIGH to LOW dead time when using the adaptive dead time algorithm (2ns resolution) 0 Adaptive LOW to HIGH dead time control 1 Freezes the LOW to HIGH dead time 0-126d Limits the minimum allowed LOW to HIGH dead time when using the adaptive dead time algorithm (2ns resolution) Page 69 of 88 ZL8800 ASCR_CONFIG (DFh) Definition: Allows user configuration of ASCR settings. ASCR gain and residual value are automatically set by the ZL8800 based on input voltage and output voltage. ASCR Gain is analogous to bandwidth, ASCR Residual is analogous to damping. To improve load transient response performance, increase ASCR Gain. To lower transient response overshoot, increase ASCR Residual. Increasing ASCR gain can result in increased PWM jitter and should be evaluated in the application circuit. Excessive ASCR gain can lead to excessive output voltage ripple. Increasing ASCR Residual to improve transient response damping can result in slower recovery times, but will not affect the peak output voltage deviation. Typical ASCR Gain settings range from 100 to 1000, and ASCR Residual settings range from 10 to 90. Paged or Global: Paged Data Length in Bytes: 4 Data Format: Bit Field and nonsigned binary Type: R/W Protectable: Yes Default Value: 015A0100h (Gain = 256d, Residual = 90d, ASCR enabled) Units: N/A COMMAND ASCR_CONFIG (DFh) Format Bit Field/Linear-8 Unsigned Bit Position 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 1 0 0 0 0 0 Function Default Value See Following Table 0 0 0 0 0 0 0 1 Format 1 Linear-16 Unsigned Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function Default Value See Following Table 0 0 BITS 31:25 24 0 0 PURPOSE Not Used ASCR Enable 23:16 ASCR Residual Setting 15:0 ASCR Gain Setting FN7558 Rev.6.00 Nov 8, 2017 0 0 0 1 0 VALUE 0000000h DESCRIPTION Not used 1 Enable 0 Disable 5Ah 0100h ASCR residual ASCR gain Page 70 of 88 ZL8800 SEQUENCE (E0h) Definition: Identifies the Rail DDC ID of the prequel and sequel rails when performing multirail sequencing. The device will enable its output when its EN or OPERATION enable state, as defined by ON_OFF_CONFIG, is set and the prequel device has issued a Power-good event on the DDC bus. The device will disable its output (using the programmed delay values) when the sequel device has issued a power-down event on the DDC bus. The data field is a two-byte value. The most-significant byte contains the 5-bit Rail DDC ID of the prequel device. The least-significant byte contains the 5-bit Rail DDC ID of the sequel device. The most significant bit of each byte contains the enable of the prequel or sequel mode. This command overrides the corresponding sequence configuration set by the CONFIG pin settings. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 00h (Prequel and sequel disabled) Units: N/A COMMAND SEQUENCE (E0h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function See Following Table Default Value BIT 15 0 FIELD NAME Prequel Enable 14:13 Not Used 12:8 Prequel Rail DDC ID 7 Sequel Enable 6:5 Not Used 4:0 Sequel Rail DDC ID FN7558 Rev.6.00 Nov 8, 2017 0 0 0 0 0 0 0 0 VALUE SETTING DESCRIPTION 0 Disable Disable, no prequel preceding this rail 1 Enable Enable, prequel to this rail is defined by bits 12:8 0 Not Used 0-31d DDC ID Set to the DDC ID of the prequel rail 0 Disable Disable, no sequel following this rail 1 Enable Enable, sequel to this rail is defined by bits 4:0 0 Not Used 0-31d DDC ID Not used Not used Set to the DDC ID of the sequel rail Page 71 of 88 ZL8800 TRACK_CONFIG (E1h) Definition: Configures the voltage tracking modes of the device. Only one channel can be configured to track: Channel 0, Channel 1, or the output of a 2-phase application. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 00h Units: N/A COMMAND TRACK_CONFIG (E1h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function Default Value BIT 7 6:3 2 1 0 See Following Table 0 0 0 0 0 FIELD NAME VALUE SETTING Voltage Tracking Control 0 Disable Tracking is disabled 1 Enable Tracking is enabled 0000 Not Used 0 100% Output tracks at 100% ratio of VTRK input 1 50% Output tracks at 50% ratio of VTRK input 0 Target Voltage Output voltage is limited by target voltage 1 VTRK Voltage Output voltage is limited by VTRK voltage 0 Track after PG The output is not allowed to track VTRK down before Power-good 1 Track always Not Used Tracking Ratio Control Tracking Upper Limit Ramp-Up Behavior FN7558 Rev.6.00 Nov 8, 2017 DESCRIPTION Not used The output is allowed to track VTRK down before Power-good Page 72 of 88 ZL8800 DDC_GROUP (E2h) Definition: Rails (output voltages) are assigned group numbers in order to share specified behaviors. The DDC_GROUP command configures fault spreading group ID and enable, broadcast OPERATION group ID and enable, and broadcast VOUT_COMMAND group ID and enable. Note that DDC groups are separate and unique from DDC phases and INTERLEAVE groups. Current sharing rails need to be in the same DDC group in order to respond to broadcast VOUT_COMMAND and OPERATION commands. Power fail event responses (and Phases) are automatically spread in phase 0 and 1 when the ZL8800 is operating in 2-phase current sharing mode when it is configured using DDC_CONFIG, regardless of its setting in DDC_GROUP. Paged or Global: Paged Data Length in Bytes: 3 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 000000h (Ignore BROADCAST VOUT_COMMAND and OPERATION, Sequence shutdown on POWER_FAIL event) Units: N/A COMMAND DDC_GROUP (E2h) Format Bit Field Bit Position 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W R/ W 0 0 0 Function Default Value See Following Table 0 0 BITS 0 Lower 5 bits of device address PURPOSE 23:22 Not Used 21 BROADCAST_VOUT_COMMAND response 20:16 BROADCAST_VOUT_COMMAND group ID 15:14 Not Used 13 BROADCAST_OPERATION response 12:8 BROADCAST_OPERATION group ID 7:6 5 4:0 0 0 0 Lower 5 bits of device address VALUE Lower 5 bits of device address DESCRIPTION 00 Not used 1 Responds to BROADCAST_VOUT_COMMAND with same Group ID 0 Ignores BROADCAST_VOUT_COMMAND 0-31d Group ID sent as data for broadcast BROADCAST_VOUT_COMMAND events 00 Not used 1 Responds to BROADCAST_OPERATION with same Group ID 0 Ignores BROADCAST_OPERATION 0-31d Group ID sent as data for broadcast BROADCAST_OPERATION events Not Used 00 Not used POWER_FAIL response 1 Responds to POWER_FAIL events with same Group ID by shutting down immediately 0 Responds to POWER_FAIL events with same Group ID with sequenced shutdown POWER_FAIL group ID FN7558 Rev.6.00 Nov 8, 2017 0-31d Group ID sent as data for broadcast POWER_FAIL events Page 73 of 88 ZL8800 DEVICE_ID (E4h) Definition: Returns the 16-byte (character) device identifier string. The format is: Part number, Major Revision, (period), Minor Revision, Engineering version letter. Paged or Global: Global Data Length in Bytes: 16 Data Format: ASCII. ISO/IEC 8859-1 Type: Block Read Protectable: No Default Value: ZL8800, current major revision, (period), current minor revision, current engineering version letter Units: N/A COMMAND DEVICE_ID (E4h) Format Characters (Bytes) Characters 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Part Number Default Value Z L 8 8 0 0 Maj. Rev. . Min. Rev * * * * Engr. * * * current revision at time of manufacture MFR_IOUT_OC_FAULT_RESPONSE (E5h) Definition: Configures the IOUT overcurrent fault response as defined by the following table. The command format is the same as the PMBus standard fault responses except that it sets the overcurrent status bit in STATUS_IOUT. The retry time is the time between restart attempts. Paged or Global: Paged Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate shutdown, no retries) Units: Retry time = 70ms COMMAND MFR_IOUT_OC_FAULT_RESPONSE (E5h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value 1 0 0 BIT FIELD NAME VALUE 00 Not used. 7:6 Response Behavior—for all modes, the device: • Pulls SALRT low • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. Retry Setting 0 0 DESCRIPTION 01 Not used. 10 Disable without delay and retry according to the setting in bits 5:3. 11 Not used. 000 No retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 111 2:0 Not Used FN7558 Rev.6.00 Nov 8, 2017 Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. Page 74 of 88 ZL8800 MFR_IOUT_UC_FAULT_RESPONSE (E6h) Definition: Configures the IOUT undercurrent fault response as defined by the following table. The command format is the same as the PMBus standard fault responses except that it sets the undercurrent status bit in STATUS_IOUT. The retry time is the time between restart attempts. Data Length in Bytes: 1 Paged or Global: Paged Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate shutdown, no retries) Units: Retry time unit = 70ms COMMAND MFR_IOUT_UC_FAULT_RESPONSE (E6h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value 1 0 0 0 0 BIT FIELD NAME VALUE DESCRIPTION 7:6 Response Behavior—for all modes, the device: • Pulls SALRT low • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. 00 Not used. 01 Not used. 10 Disable without delay and retry according to the setting in Bits 5:3. 11 Not used. Retry Setting 000 No retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 111 2:0 Not Used FN7558 Rev.6.00 Nov 8, 2017 Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. Page 75 of 88 ZL8800 IOUT_AVG_OC_FAULT_LIMIT (E7h) Definition: Sets the IOUT average overcurrent fault threshold. For downslope sensing, this corresponds to the average of all the current samples taken during the (1-D) time interval, excluding the current sense blanking time (which occurs at the beginning of the 1-D interval). For up-slope sensing, this corresponds to the average of all the current samples taken during the D time interval, excluding the current sense blanking time (which occurs at the beginning of the D interval). This feature shares the OC fault bit operation (in STATUS_IOUT) and OC fault response with IOUT_ OC_FAULT_LIMIT. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: 16A (DA00h) Units: Amperes Equation: IOUT_AVG_OC_FAULT_LIMIT = Y×2N Range: -100 to 100A COMMAND IOUT_AVG_OC_FAULT_LIMIT (E7h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Signed Exponent, N Signed Mantissa, Y Default Value 0.8 x IOUT_OC_FAULT_LIMIT IOUT_AVG_UC_FAULT_LIMIT (E8h) Definition: Sets the IOUT average undercurrent fault threshold. For downslope sensing, this corresponds to the average of all the current samples taken during the (1-D) time interval, excluding the current sense blanking time (which occurs at the beginning of the 1-D interval). For up-slope sensing, this corresponds to the average of all the current samples taken during the D time interval, excluding the current sense blanking time (which occurs at the beginning of the D interval). This feature shares the UC fault bit operation (in STATUS_IOUT) and UC fault response with IOUT_ UC_FAULT_LIMIT. Paged or Global: Paged Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: -16A (DE00h) Units: Amperes Equation: IOUT_AVG_UC_FAULT_LIMIT = Y×2N Range: -100 to 100A COMMAND IOUT_AVG_UC_FAULT_LIMIT (E8h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function Default Value FN7558 Rev.6.00 Nov 8, 2017 Signed Exponent, N Signed Mantissa, Y 0.8 x IOUT_UC_FAULT_LIMIT Page 76 of 88 ZL8800 USER_GLOBAL_CONFIG (E9h) Definition: Sets options for the output voltage sensing, maximum output voltage override, SMBus time-out, and DDC and SYNC output configurations. Paged or Global: Global Data Length in Bytes: 2 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 0000h Units: N/A COMMAND USER_GLOBAL_CONFIG (E9h) Format Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function See Following Table Default Value 0 BITS 15:10 9:8 7 6 5 4 3 0 0 0 PURPOSE Not Used Vsense Select for monitoring and fault detection 0 0 0 0 VALUE 000000 DESCRIPTION Not used 00 Output 0 uses VSEN0, Output 1 uses VSEN1 01 Both outputs use VSEN0 10 Both outputs use VSEN1 Not Used 0 Not used DDC Output Configuration 0 DDC output open-drain 1 DDC output push-pull Not Used 0 Not used Disable SMBus Time-Outs 0 SMBus time-outs enabled 1 SMBus time-outs disabled Not Used 0 Not used Sync I/O Control 00 Use internal clock (frequency initially set with pin-strap) 01 Use internal clock and output internal clock (not for use with pin-strap) 10 Use external clock 11 Not used 0 Not used 2:1 0 0 Not Used FN7558 Rev.6.00 Nov 8, 2017 Page 77 of 88 ZL8800 SNAPSHOT (EAh) Definition: A 32-byte read-back of parametric and status values. It allows monitoring and status data to be stored to flash either during a fault condition or through a system-defined time using the SNAPSHOT_CONTROL command. Snapshot is continuously updated in RAM and can be read using the SNAPSHOT command. When a fault occurs, the latest snapshot in RAM is stored to flash. Snapshot data can read back by writing a 01h to the SNAPSHOT_CONTROL command, then reading SNAPSHOT. Paged or Global: Paged Data Length in Bytes: 32 Data Format: Bit Field Type: Block Read Protectable: No Default Value: N/A Units: N/A BYTE NUMBER 31:23 VALUE PMBus COMMAND FORMAT Not Used Not Used 0000h 22 Flash Memory Status Byte N/A Bit Field 21 Manufacturer Specific Status Byte STATUS_MFR_SPECIFIC (80h) 1 Byte Bit Field 20 CML Status Byte STATUS_CML (7Eh) 1 Byte Bit Field 19 Temperature Status Byte STATUS_TEMPERATURE (7Dh) 1 Byte Bit Field 18 Input Status Byte STATUS_INPUT (7Ch) 1 Byte Bit Field 17 Iout Status Byte STATUS_IOUT (7Bh) 1 Byte Bit Field 16 Vout Status Byte STATUS_VOUT (7Ah) 1 Byte Bit Field 15:14 Switching Frequency READ_FREQUENCY (95h) 2 Byte Linear-11 13:12 External Temperature READ_TEMPERATURE_2 (8Eh) 2 Byte Linear-11 11:10 Internal Temperature READ_TEMPERATURE_1 (8Dh) 2 Byte Linear-11 9:8 Duty Cycle READ_DUTY_CYCLE (94h) 2 Byte Linear-11 7:6 Highest Measured Output Current N/A 2 Byte Linear-11 5:4 Output Current READ_IOUT (8Ch) 2 Byte Linear-11 3:2 Output Voltage READ_VOUT (8Bh) 2 Byte Linear-16 Unsigned 1:0 Input Voltage READ_VIN (88h) 2 Byte Linear-11 BLANK_PARAMS (EBh) Definition: Returns a 16-byte string which indicates which parameter values were either retrieved by the last RESTORE operation or have been written since that time. Reading BLANK_PARAMS immediately after a restore operation allows the user to determine which parameters are stored in that store. A one indicates the parameter is not present in the store and has not been written since the RESTORE operation. Paged or Global: Paged Data Length in Bytes: 16 Data Format: Bit Field Type: Block Read Protectable: No Default Value: FF…FFh Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 78 of 88 ZL8800 LEGACY_FAULT_GROUP (F0h) Definition: Allows the ZL8800 to sequence and fault spread with devices other than the ZL8800 family of ICs. This command sets which rail DDC IDs should be listened to for fault spreading information. The data sent is a 4-byte, 32-bit vector where every bit represents a rail’s DDC ID. A bit set to 1 indicates a device DDC ID to which the configured device will respond upon receiving a fault spreading event. In this vector, bit 0 of byte 0 corresponds to the rail with DDC ID 0. Following through, Bit 7 of byte 3 corresponds to the rail with DDC ID 31. NOTE: The device/rail’s own DDC ID should not be set within the LEGACY_FAULT_GROUP command for that device/rail. All devices in a current share rail (devices other than the ZL8800 family ICs) must shut down for the rail to report a shutdown. If fault spread mode is enabled in USER_CONFIG, the device will immediately shut down if one of its DDC_GROUP members fail. The device/rail will attempt its configured restart only after all devices/rails within the DDC_GROUP have cleared their faults. If fault spread mode is disabled in USER_CONFIG, the device will perform a sequenced shutdown as defined by the SEQUENCE command setting. The rails/devices in a sequencing set only attempt their configured restart after all faults have cleared within the DDC_GROUP. If fault spread mode is disabled and sequencing is also disabled, the device will ignore faults from other devices and stay enabled. Paged or Global: Paged Data Length in Bytes: 4 Data Format: Bit field Type: Block R/W Protectable: Yes Default Value: 00000000h Units: N/A COMMAND LEGACY_FAULT_GROUP (F0h) Format Bit Field Bit Position 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function Default Value See Following Table 0 0 0 0 0 0 0 Format 0 0 Bit Field Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 0 Function Default Value BIT 31:0 See Following Table 0 0 FIELD NAME Fault Group FN7558 Rev.6.00 Nov 8, 2017 0 0 0 0 VALUE SETTING NA 00000000h 0 0 0 DESCRIPTION Identifies the devices in the fault spreading group. Page 79 of 88 ZL8800 SNAPSHOT_CONTROL (F3h) Definition: Writing a 01h will cause the device to copy the current SNAPSHOT values from NVRAM to the 32-byte SNAPSHOT command parameter. Writing a 02h will cause the device to write the current SNAPSHOT values to NVRAM, 03h will erase all SNAPSHOT values from NVRAM. Write (02h) and Erase (03h) can be used only when the device is disabled. All other values will be ignored. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: R/W byte Protectable: Yes Default Value: N/A Units: N/A COMMAND SNAPSHOT_CONTROL (F3h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function Default Value See Following Table 0 0 0 VALUE 01 0 0 DESCRIPTION Read SNAPSHOT values from NVRAM 02 Write SNAPSHOT values to NVRAM 03 Erase SNAPSHOT values from NV RAM RESTORE_FACTORY (F4h) Definition: Restores the device to the hard-coded factory default values and pin-strap definitions. The device retains the DEFAULT and USER stores for restoring. Security level is changed to Level 1 following this command. Paged or Global: Global Data Length in Bytes: 0 Data Format: N/A Type: Write only Protectable: Yes Default Value: N/A Units: N/A FN7558 Rev.6.00 Nov 8, 2017 Page 80 of 88 ZL8800 MFR_VMON_OV_FAULT_LIMIT (F5h) Definition: Sets the VMON overvoltage fault threshold. A VMON parameter equals 16 times the voltage applied to the VMON pin. The VMON overvoltage warn limit is automatically set to 90% of this fault value. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: D300h (12V) Units: V Equation: MFR_VMON_OV_FAULT_LIMIT = Y×2N Range: 0 to 19V COMMAND MFR_VMON_OV_FAULT_LIMIT (F5h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 1 1 0 1 Signed Mantissa, Y 0 0 1 1 0 0 0 0 MFR_VMON_UV_FAULT_LIMIT (F6h) Definition: Sets the VMON undervoltage fault threshold. A VMON parameter equals 16 times the voltage applied to the VMON pin. The VMON undervoltage warn limit is automatically set to 110% of this fault value. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: R/W Protectable: Yes Default Value: CA40h (4.5V) Units: V Equation: MFR_VMON_UV_FAULT_LIMIT = Y x 2N Range: 0 to 19V COMMAND MFR_VMON_UV_FAULT_LIMIT (F6h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 0 Function Default Value Signed Exponent, N 1 FN7558 Rev.6.00 Nov 8, 2017 1 0 0 Signed Mantissa, Y 1 0 1 0 0 1 0 0 Page 81 of 88 ZL8800 MFR_READ_VMON (F7h) Definition: Reads the VMON voltage. Paged or Global: Global Data Length in Bytes: 2 Data Format: Linear-11 Type: Read only Protectable: No Default Value: N/A Units: V Equation: MFR_READ_VMON = Y x 2N Range: 0 to 19V COMMAND MFR_READ_VMON (F7h) Format Linear-11 Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W N/A N/A N/A N/A Function Default Value Signed Exponent, N N/A N/A N/A Signed Mantissa, Y N/A N/A N/A N/A N/A N/A N/A N/A N/A VMON_OV_FAULT_RESPONSE (F8h) Definition: Configures the VMON overvoltage fault response as defined by the following table. The retry time is the time between restart attempts. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate Shutdown, no retries) Units: Retry time unit = 70ms COMMAND VMON_OV_FAULT_RESPONSE (F8h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 7:6 1 FIELD NAME Response Behavior—the device: • Pulls SALRT low • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. Retry Setting 0 0 VALUE 0 0 DESCRIPTION 00 Not used. 01 Not used. 10 Disable without delay and retry according to the setting in Bits 5:3. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 111 2:0 Not Used FN7558 Rev.6.00 Nov 8, 2017 Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. Page 82 of 88 ZL8800 VMON_UV_FAULT_RESPONSE (F9h) Definition: Configures the VMON undervoltage fault response as defined by the following table. Note: The retry time is the time between restart attempts. Paged or Global: Global Data Length in Bytes: 1 Data Format: Bit Field Type: R/W Protectable: Yes Default Value: 80h (Immediate shutdown, no retries) Units: Retry time unit = 70ms COMMAND VMON_UV_FAULT_RESPONSE (F9h) Format Bit Field Bit Position 7 6 5 4 3 2 1 0 Access R/W R/W R/W R/W R/W R/W R/W R/W 0 0 0 Function See Following Table Default Value BIT 7:6 1 FIELD NAME Response Behavior—the device: • Pulls SALRT low • Sets the related fault bit in the status registers. Fault bits are only cleared by the CLEAR_FAULTS command. Retry Setting 0 0 VALUE 0 0 DESCRIPTION 00 Not used. 01 Not used. 10 Disable without delay and retry according to the setting in Bits 5:3. 11 Output is disabled while the fault is present. Operation resumes and the output is enabled when the fault condition no longer exists. 000 No Retry. The output remains disabled until the fault is cleared. 001-110 Not used. 5:3 111 2:0 Not Used Attempts to restart continuously, without checking if the fault is still present, until it is commanded OFF (by the CONTROL pin or OPERATION command or both), bias power is removed, or another fault condition causes the unit to shut down. 000-111 Not used. SECURITY_LEVEL (FAh) Definition: The device provides write protection for individual commands. Each bit in the UNPROTECT parameter controls whether its corresponding command is writeable (commands are always readable). If a command is not writeable, a password must be entered in order to change its parameter (that is, to enable writes to that command). Passwords can be either public or private. The public password provides a simple lock-and-key protection against accidental changes to the device. It would typically be sent to the device in the application prior to making changes. Private passwords allow commands marked as non-writeable in the UNPROTECT parameter to be changed. Private passwords are intended for protecting default-installed configurations and would not typically be used in the application. Each store (USER and DEFAULT) can have its own UNPROTECT string and private password. If a command is marked as non-writeable in the DEFAULT UNPROTECT parameter (its corresponding bit is cleared), the private password in the DEFAULT Store must be sent in order to change that command. If a command is writeable according to the Default UNPROTECT parameter, it may still be marked as non-writeable in the User Store UNPROTECT parameter. In this case, the User private password can be sent to make the command writeable. The device supports four levels of security. Each level is designed to be used by a particular class of users, ranging from module manufacturers to end users, as discussed in the following sections. Levels 0 and 1 correspond to the public password. All other levels require a private password. Writing a private password can only raise the security level. Writing a public password will reset the level down to 0 or 1. Figure 13 shows the algorithm used by the device to determine if a particular command write is allowed. FN7558 Rev.6.00 Nov 8, 2017 Page 83 of 88 ZL8800 Write Attempted Always Writeable ? Y N Read Only ? Y N Security Level == 3 ? Y N Default UNPROTECT == 0 ? Y N Security Level == 2 ? Y N User UNPROTECT == 0 ? Y N Write Prohibited N Security Level == 1 ? Y Write Allowed FIGURE 13. ALGORITHM USED TO DETERMINE WHEN A COMMAND IS WRITEABLE Security Level 3 – Module Vendor Level 3 is intended primarily for use by Module vendors to protect device configurations in the Default Store. Clearing an UNPROTECT bit in the Default Store implies that a command is writeable only at Level 3 and above. The device’s security level is raised to Level 3 by writing the private password value previously stored in the Default Store. To be effective, the module vendor must clear the UNPROTECT bit corresponding to the STORE_DEFAULT_ALL and RESTORE_DEFAULT commands. Otherwise, Level 3 protection is ineffective since the entire store could be replaced by the user, including the enclosed private password. Security Level 2 – User Level 2 is intended for use by the end user of the device. Clearing an UNPROTECT bit in the User Store implies that a command is writeable only at Level 2 and above. The device’s security level is raised to Level 2 by writing the private password value previously stored in the User Store. To be effective, the user must clear the UNPROTECT bit corresponding to the STORE_USER_ALL, RESTORE_DEFAULT_ALL, STORE_DEFAULT_ALL, and RESTORE_DEFAULT commands. Otherwise, Level 2 protection is ineffective since the entire store could be replaced, including the enclosed private password. Security Level 1 – Public Level 1 is intended to protect against accidental changes to ordinary commands by providing a global write-enable. It can be used to protect the device from erroneous bus operations. It provides access to commands whose UNPROTECT bit is set in both the Default and User Store. Security is raised to Level 1 by writing the public password stored in the User Store using the PUBLIC_PASSWORD command. The public password stored in the Default Store has no effect. FN7558 Rev.6.00 Nov 8, 2017 Page 84 of 88 ZL8800 Security Level 0 - Unprotected Level 0 implies that only commands which are always writeable (such as PUBLIC_PASSWORD) are available. This represents the lowest authority level and hence the most protected state of the device. The level can be reduced to 0 by using PUBLIC_PASSWORD to write any value which does not match the stored public password. Paged or Global: Global Data Length in Bytes: 1 Data Format: Hex Type: Read Byte Protectable: No Default Value: 01h Units: N/A Reference: AN2031 - “Writing Configuration Files for Intersil Digital Power” PRIVATE_PASSWORD (FBh) Definition: Sets the private password string. Paged or Global: Global Data Length in Bytes: 9 Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: No Default Value: 000000000000000000h Units: N/A Reference: AN2031 - “Writing Configuration Files for Intersil Digital Power” PUBLIC_PASSWORD (FCh) Definition: Sets the public password string. Paged or Global: Global Data Length in Bytes: 4 Data Format: ASCII. ISO/IEC 8859-1 Type: Block R/W Protectable: No Default Value: 00000000h Units: N/A Reference: AN2031 - “Writing Configuration Files for Intersil Digital Power” UNPROTECT (FDh) Definition: Sets a 256-bit (32-byte) parameter which identifies which commands are to be protected against write-access at lower security levels. Each bit in this parameter corresponds to a command according to the command’s code. The command with a code of 00h (PAGE) is protected by the least-significant bit of the least-significant byte, followed by the command with a code of 01h and so forth. Note that all possible commands have a corresponding bit regardless of whether they are protectable or supported by the device. Clearing a command’s UNPROTECT bit indicates that write-access to that command is only allowed if the device’s security level has been raised to an appropriate level. The UNPROTECT bits in the DEFAULT store require a security level 3 or greater to be writeable. The UNPROTECT bits in the USER store require a security level of 2 or higher. Data Length in Bytes: 32 Paged or Global: Global Data Format: Custom Type: Block R/W Protectable: No Default Value: FF…FFh Units: N/A Reference: AN2031 - “Writing Configuration Files for Intersil Digital Power” FN7558 Rev.6.00 Nov 8, 2017 Page 85 of 88 ZL8800 Firmware Revision History FIRMWARE REVISION CODE CHANGE DESCRIPTION NOTE 1.06 Fix to start-up routine to improve SA pin read performance at cold temperatures. Improved fault retry performance. Improved DDC compatibility with previous generations of Intersil controllers and modules. Addition of the LEGACY_FAULT_GROUP command to allow for fault spreading over Intersil’s DDC bus with previous generation of controllers and modules. Recommended for new designs Defaults for IOUT_XXX and TOFF_FALL are fixed values; they are no longer dependent on other command values. Some command defaults may differ from 1.04 values by one bit. TOFF_DELAY settings less than 0.5ms will set the device to immediate off shutdown behavior. INTERLEAVE default automatically phase spread in 2 channel mode. DDC_CONFIG default automatically sets group number. 1.04 Initial release Not recommended for new designs Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please visit our website to make sure you have the latest revision. DATE REVISION Nov 8, 2017 FN7558.6 Added an explanation of the EN0 and EN1 timing restrictions to “Enable Pin Operation and Timing” on page 15. Updated to the current Renesas format. Aug 10, 2017 FN7558.5 In the Features section, updated the voltage range to “4.5V to 5.5V or 6.5V to 14V” Updated application diagrams to show use of DRMOS devices. Added a two phase schematic diagram with DrMOS. Pin Description section For the SCL and SDA pins, added “Requires a pull-up resistor to a 2.5V to 5.5V (recommend VR5, do not use V25) source. Pull-up supply must be from an “always on” source or VR5.” For the SALRT pin, added “Requires a pull-up resistor to a 2.5V to 5.5V (recommend VR5, do not use V25) source. Leave floating if not used.” For the SGND pin, added “All pin-strap resistors should be connected to SGND. SGND must be connected to DGND and PGND using a single point connection.” For the SA pin, added “Connect resistor to SGND.” For VSET0, added “Default VOUT max is 115% of VOUT setting, but this can be overridden through the PMBus interface with the VOUT_MAX command. Connect resistor to SGND.” For VSET1, added “Default VOUT max is 115% of VOUT setting, but this can be overridden through the PMBus interface with the VOUT_MAX command. Connect resistor to SGND. NOT USED IN 2-PHASE MODE. Leave floating in 2-phase mode.” For XTEMP0P, XTEMP0N, VTRKP, and VTRKN, added “If not used connect to SGND.” For VDRV, VR6, and VR5, added “10µF recommended.” For VSEN1N, added “in 2-channel or 2-phase mode.” For VSEN1P, added “in 2-channel or 2-phase mode.” In the Ordering Information table, added “Recommended for new designs” column. For 4Bh IOUT_UC_FAULT_LIMIT, changed the default setting to “-20A”. For 65h TOFF_FALL, changed the default setting to “5ms”. For E7h IOUT_AVG_OC_FAULT_LIMIT, changed the default setting to “16A”. For E8h IOUT_AVG_UC_FAULT_LIMIT, changed the default setting to “-16A”. For 80h STATUS_MFR_SPECIFIC, reworded VMON_UV_WARNING and VMON_OV_WARNING for clarity. In the Firmware Revision History, added some previously undocumented firmware changes to the 1.06 revision. Added a recommendation for 10uF bypass capacitor on VR5, VR6, and VDRV. Added a recommendation to pull-up DDC to VR5. Corrected several PMBus command descriptions to show correct default value and Global or Paged behavior. FN7558 Rev.6.00 Nov 8, 2017 CHANGE Page 86 of 88 ZL8800 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please visit our website to make sure you have the latest revision. (Continued) DATE REVISION CHANGE May 1, 2017 FN7558.4 Updated Related Literature section. Applied new header/footer. Updated Ordering Information table added ZL8800ALAFT7A and ZL8800ALBFT7A Clarified relationship between POWER_GOOD_ON and VOUT_UV_FAULT_LIMIT thresholds in “Power-Good” on page 15, the “PMBus Command Summary” table, and the “VOUT_UV_FAULT_LIMIT (44h)” and “POWER_GOOD_ON (5Eh)” register descriptions. Sept 14, 2015 FN7558.3 Added Related Literature section on page 1. Added Key Differences table to page 1. Updated Ordering Information table on page 8 by adding ZL8800ALBFT and ZL8800ALBFTK part numbers, added FIRMWARE REVISION column, and added Note 5. Added LEGACY_FAULT_GROUP command to “PMBus Command Summary” on page 28 and in the Command descriptions on page 79. Changed reference to 30ms to 70ms, and 20 to 30ms to 60 to 70ms in “Start-Up Procedure” on page 15. Added detail to TON_DELAY Range description on page 48. Added detail to TON_RISE Range description on page 48. Added detail to TOFF_DELAY Range description on page 49. Added Firmware Revision History section. Nov 11, 2013 FN7558.2 Added “™” to ChargeMode - page 1 title, third paragraph and trademark statement. Oct 10, 2013 FN7558.1 The maximum ramp-up time and ramp-down time changed from 200ms to 100ms: pages 10, 47, 48. The maximum soft-start delay, turn-off delay, and Power-good delay changed on pages 47, 48 and 62 to 5 seconds to match the limits in the EC table (page 10). The second table on page 60. The location and size of the bit field for minimum duty cycle changed from 2 bits in location 9:8 to 5 bits in location 15:11. Sept 18, 2013 FN7558.0 Initial release About Intersil Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets. For the most updated datasheet, application notes, related documentation and related parts, please see the respective product information page found at www.intersil.com. For a listing of definitions and abbreviations of common terms used in our documents, visit: www.intersil.com/glossary. You can report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask. Reliability reports are also available from our website at www.intersil.com/support. © Copyright Intersil Americas LLC 2013-2017. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com FN7558 Rev.6.00 Nov 8, 2017 Page 87 of 88 ZL8800 Package Outline Drawing For the most recent package outline drawing, see L44.7x7B. L44.7x7B 44 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 10/09 7.00 A 5.00 TYP 40X 0.50 B 6 PIN 1 INDEX AREA 6 PIN #1 INDEX 1 AREA 44 34 7.00 33 5.20 ±0.1 EXP. DAP 23 (4X) 44X 0.25 4 0.10 M C A B 0.15 TOP VIEW 11 22 SIDE VIEW 12 5.20 ±0.1 EXP. DAP 44X 0.55 ±0.1 BOTTOM VIEW ( 6.65 ) SEE DETAIL "X" ( 5.20) 0.10 C 1.00 MAX C 0.08 C SIDE VIEW ( 6.65 ) ( 5.20 ) ( 40X 0.50) C (44X .25) 0.2 REF 5 0 . 00 MIN. 0 . 05 MAX. ( 44 X 0.75) TYPICAL RECOMMENDED LAND PATTERN DETAIL "X" NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be 7. Complies to JEDEC MO220 VKKD-1. either a mold or mark feature. FN7558 Rev.6.00 Nov 8, 2017 Page 88 of 88