PTH08T220WAZT

PTH08T220W, PTH08T221W www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009 16-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans™ FEATURES 1 • • • • • • 2 • • • • • • • • Up to 16-A Output Current 4.5-V to 14-V Input Voltage Wide-Output Voltage Adjust (0.69 V to 5.5 V) ±1.5% Total Output Voltage Variation Efficiencies up to 96% Output Overcurrent Protection (Nonlatching, Auto-Reset) Operating Temperature: –40°C to 85°C Safety Agency Approvals: – UL/IEC/CSA-C22.2 60950-1 Prebias Startup On/Off Inhibit Differential Output Voltage Remote Sense Adjustable Undervoltage Lockout Ceramic Capacitor Version (PTH08T221W) POLA™ Compatible • • • • TurboTrans™ Technology Designed to meet Ultra-Fast Transient Requirements up to 300 A/µs SmartSync Technology Auto-Track™ Sequencing APPLICATIONS • • • Complex Multi-Voltage Systems Microprocessors Bus Drivers DESCRIPTION The PTH08T220/221W is a high-performance 16-A rated, non-isolated power module. These modules represent the 2nd generation of the popular PTH series power modules and include a reduced footprint and improved features. The PTH08T221W is optimized to be used with all ceramic capacitors. Operating from an input voltage range of 4.5 V to 14 V, the PTH08T220/221W requires a single resistor to set the output voltage to any value over the range, 0.69 V to 5.5 V. The wide input voltage range makes the PTH08T220/221W particularly suitable for advanced computing and server applications that utilize a loosely regulated 8-V to 12-V intermediate distribution bus. Additionally, the wide input voltage range increases design flexibility by supporting operation with tightly regulated 5-V, 8-V, or 12-V intermediate bus architectures. The module incorporates a comprehensive list of features. Output over-current and over-temperature shutdown protects against most load faults. A differential remote sense ensures tight load regulation. An adjustable under-voltage lockout allows the turn-on voltage threshold to be customized. Auto-Track™ sequencing is a popular feature that greatly simplifies the simultaneous power-up and power-down of multiple modules in a power system. The PTH08T220/221W includes new patent pending technologies, TurboTrans™ and SmartSync. The TurboTrans feature optimizes the transient response of the regulator while simultaneously reducing the quantity of external output capacitors required to meet a target voltage deviation specification. Additionally, for a target output capacitor bank, TurboTrans can be used to significantly improve the regulators transient response by reducing the peak voltage deviation. SmartSync allows for switching frequency synchronization of multiple modules, thus simplifying EMI noise suppression tasks and reducing input capacitor RMS current requirements. The module uses double-sided surface mount construction to provide a low profile and compact footprint. Package options include both through-hole and surface mount configurations that are lead (Pb) - free and RoHS compatible. 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. TurboTrans, POLA, Auto-Track, TMS320 are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2005–2009, Texas Instruments Incorporated PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. PTH08T220W SmartSync TurboTranst Track 10 VI 2 1 Track SYNC TT +Sense VI VO PTH08T220W Inhibit 11 INH/UVLO −Sense GND GND VOAdj 3 4 8 + GND RUVLO 1% 0.05 W (Opional) CI 330 µF (Required) RTT 1% 0.05 W (Optional) 9 CI2 22 µF (Required) 6 +Sense 5 Vo 7 L O A D + CO 220 µF (Required) RSET [A] 1% 0.05 W (Required) −Sense GND UDG−05098 A. RSET required to set the output voltage to a value higher than 0.69 V. See Electrical Characteristics table. PTH08T221W - Ceramic Capacitor Version SmartSync Track TurboTranst 10 VI Track 2 1 SYNC TT +Sense VI VO PTH08T221W Inhibit 11 3 RUVLO 1% 0.05 W (Opional) CI 300 µF (Required) 6 5 VO −Sense GND 4 VOAdj 8 L O A D CO 300 µF (Required) RSET [A] 1% 0.05 W (Required) −Sense GND 2 +Sense 7 INH/UVLO GND RTT 1% 0.05 W (Optional) 9 GND A. RSET required to set the output voltage to a value higher than 0.69 V. See Electrical Characteristics table. B. 300 µF of ceramic or 330 µF of electrolytic input capacitance is required for proper operation. Submit Documentation Feedback Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W PTH08T220W, PTH08T221W www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009 ORDERING INFORMATION For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see the TI website at www.ti.com. DATASHEET TABLE OF CONTENTS DATASHEET SECTION PAGE NUMBER ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS 3 ELECTRICAL CHARACTERISTICS TABLE (PTH08T220W) 4 ELECTRICAL CHARACTERISTICS TABLE (PTH08T221W) 6 TERMINAL FUNCTIONS 8 TYPICAL CHARACTERISTICS (VI = 12V) 9 TYPICAL CHARACTERISTICS (VI = 5V) 10 ADJUSTING THE OUTPUT VOLTAGE 11 INPUT & OUTPUT CAPACITOR RECOMMENDATIONS 13 TURBOTRANS™ INFORMATION 17 UNDERVOLTAGE LOCKOUT (UVLO) 22 SOFT-START POWER-UP 23 OUTPUT INHIBIT 24 OVER-CURRENT PROTECTION 25 OVER-TEMPERATURE PROTECTION 25 REMOTE SENSE 25 SYCHRONIZATION (SMARTSYNC) 26 AUTO-TRACK SEQUENCING 27 PREBIAS START-UP 30 TAPE & REEL AND TRAY DRAWINGS 32 ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) UNIT Vtrack Track pin voltage TA Operating temperature range Over VI range Twave Wave soldering temperature Surface temperature of module body or pins for 5 seconds maximum. Treflow Solder reflow temperature Surface temperature of module body or pins Tstg Storage temperature Storage temperature of module removed from shipping package Tpkg Packaging temperature Shipping Tray or Tape and Reel storage or bake temperature 45 Mechanical shock Per Mil-STD-883D, Method 2002.3 1 msec, 1/2 sine, mounted AH and AD suffix 500 AS and AZ suffix 125 Mechanical vibration –0.3 to VI + 0.3 AH suffix AD suffix Mil-STD-883D, Method 2007.2 20-2000 Hz Weight Flammability (1) V –40 to 85 260 AS suffix 235 (1) AZ suffix 260 (1) °C –55 to 125 G 20 5 grams Meets UL94V-O During reflow of surface mount package version do not elevate peak temperature of the module, pins or internal components above the stated maximum. Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W Submit Documentation Feedback 3 PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS PTH08T220W TA = 25°C, VI = 5 V, VO = 3.3 V, CI = 330 µF, CI2 = 22 µF, CO = 220 µF, and IO = IO max (unless otherwise stated) PARAMETER TEST CONDITIONS PTH08T220W MIN IO Output current Over VO range 25°C, natural convection Input voltage range VOADJ Output voltage adjust range Over IO range η 1.2 < VO ≤ 3.6 4.5 14 3.6 < VO ≤ 5.5 VO + 2 14 Over IO range 0.69 ±0.3 %Vo ±3 mV Load regulation Over IO range ±2 Total output variation Includes set-point, line, load, –40°C ≤ TA ≤ 85°C IO = 16 A 95% RSET = 1.21 kΩ, VO = 3.3 V 94% RSET = 2.38 kΩ, VO = 2.5 V 91% RSET = 4.78 kΩ, VO = 1.8 V 88% (1) RSET = 20.8 kΩ, VO = 1.0 V (1) Overcurrent threshold Reset, followed by auto-recovery Transient response 2.5 A/µs load step 50 to 100% IOmax VO = 2.5 V w/ TurboTrans CO= 2000 µF, TypeC RTT = short IIL Track input current (pin 10) Pin to GND dVtrack/dt Track slew rate capability CO ≤ CO (max) UVLOADJ VI increasing, RUVLO = OPEN Adjustable Under-voltage lockout VI decreasing, RUVLO = OPEN (pin 11) Hysteresis, RUVLO ≤ 52.3 kΩ 82% (1) A Recovery time 70 µs VO over/undershoot 150 mV Recovery time 130 µs VO over/undershoot 30 4.3 3.7 Inhibit (pin 11) to GND, Track (pin 10) open fs Switching frequency Over VI and IO ranges, SmartSync (pin 1) to GND fSYNC Synchronization (SYNC) frequency VSYNCH SYNC High-Level Input Voltage VSYNCL SYNC Low-Level Input Voltage tSYNC SYNC Minimum Pulse Width CI External input capacitance (5) 4 (3) µA 1 V/ms 4.45 4.2 V 0.5 Open (4) -0.2 Input low current (IIL ), Pin 11 to GND Input standby current mV –130 Input low voltage (VIL) Iin (4) mVPP 32 Input high voltage (VIH) Inhibit control (pin 11) %Vo 84% 15 w/o TurboTrans CO= 220 µF, TypeC (2) 87% RSET = 12.1 kΩ, VO = 1.2 V 20-MHz bandwidth mV ±1.5 RSET = 171 Ω, VI = 8 V, VO = 5.0 V VO Ripple (peak-to-peak) ΔVtrTT (3) V %Vo Over VI range ΔVtr (2) (2) –40°C < TA < 85°C ttr (1) ±1 V Line regulaltion RSET = 7.09 kΩ, VO = 1.5 V ttrTT 5.5 ±0.5 A (1) 14 Temperature variation Efficiency ILIM 16 4.5 Set-point voltage tolerance VO UNIT MAX 0 0.69 ≤ VO ≤ 1.2 VI TYP 0.8 V -235 µA 5 mA 300 kHz 240 400 kHz 2 5.5 V 0.8 200 Nonceramic 330 (5) Ceramic 22 (5) V nSec µF For output voltages ≤ 1.2 V, at nominal operating frequency, the output ripple may increase (typically 2×) when operating at input voltages greater than (VO × 11). When using the SmartSync feature to adjust the switching frequency, see the SmartSync Considerations section of the datasheet for further guidance. The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1% with 100 ppm/C or better temperature stability. A low-leakage ( 1100 µF.) To ensure stability, a minimum amount of output capacitance is required for a given RTT resistor value. The value of RTT must be calculated using the minimum required output capacitance determined from Figure 15 and Figure 16. Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W Submit Documentation Feedback 19 PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com PTH08T220W Type C Capacitors 12-V INPUT 5-V INPUT 20 20 With TurboTrans Without TurboTrans 10 9 8 7 Transient − mV/A 6 5 4 3 10 9 8 7 6 5 4 3 VI = 5 V VI = 12 V 3000 4000 5000 6000 7000 8000 9000 10000 C − Capacitance − µF 2000 300 200 2000 300 3000 4000 5000 6000 7000 8000 9000 10000 2 400 500 600 700 800 900 1000 200 2 400 500 600 700 800 900 1000 Transient − mV/A With TurboTrans Without TurboTrans C − Capacitance − µF Figure 17. Capacitor Type C, 5000 < C(µF)×ESR(mΩ) ≤ 10,000(e.g. OS-CON) Figure 18. Capacitor Type C, 5000 < C(µF)×ESR(mΩ) ≤ 10,000(e.g. OS-CON) Table 6. Type C TurboTrans CO Values and Required RTT Selection Table Transient Voltage Deviation (mV) 12 Volt Input 5 Volt Input 25% Load Step (4 A) 50% Load Step (8 A) 75% Load Step (12 A) CO Minimum Required Output Capacitance (µF) RTT Required TurboTrans Resistor (kΩ) CO Minimum Required Output Capacitance (µF) RTT Required TurboTrans Resistor (kΩ) 65 125 190 220 open 220 open 50 100 150 270 274 330 121 40 80 120 330 121 550 34.8 30 60 90 470 48.7 630 26.1 25 50 75 600 28.7 800 16.2 20 40 60 800 16.2 1150 7.15 15 30 45 1300 5.11 1700 1.50 10 20 30 7500 short 10000 short RTT Resistor Selection For VO ≤ 3.45V the TurboTrans resistor value, RTT can be determined from the TurboTrans programming Equation 4. For VO > 3.45 V please contact TI for CO and RTT values. R TT + 40 ƪ1 * ǒC Oń1980Ǔƫ ǒ Ǔ ǒ5 C OǓ)880 1980 (kW) *1 (4) Where CO is the total output capacitance in µF. CO values greater than or equal to 1980 µF require RTT to be a short, 0Ω. (Equation 4 results in a negative value for RTT when CO > 1980 µF). To ensure stability, a minimum amount of output capacitance is required for a given RTT resistor value. The value of RTT must be calculated using the minimum required output capacitance determined from Figure 17 and Figure 18. 20 Submit Documentation Feedback Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W PTH08T220W, PTH08T221W www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009 TurboTrans 10 1 VI AutoTrack TurboTrans +Sense Smart Sync 2 PTH08T220W VI 11 Inhibit/ Prog UVLO 3 CI2 22 mF (Required) 4 6 +Sense 5 VO VO −Sense GND CI 330 mF (Required) RTT 0 kW 9 7 VOAdj 8 L O A D CO 1220 mF Type B RSET 1% 0.05 W −Sense GND GND Figure 19. Typical TurboTrans™ Application Without TurboTrans 100 mV/div With TurboTrans 100 mV/div 2.5 A/ms 50% Load Step Figure 20. TurboTrans Waveform Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W Submit Documentation Feedback 21 PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com ADJUSTING THE UNDERVOLTAGE LOCKOUT (UVLO) The PTH08T220/221W power modules incorporate an input undervoltage lockout (UVLO). The UVLO feature prevents the operation of the module until there is sufficient input voltage to produce a valid output voltage. This enables the module to provide a clean, monotonic powerup for the load circuit, and also limits the magnitude of current drawn from the regulator’s input source during the power-up sequence. The UVLO characteristic is defined by the ON threshold (VTHD) voltage. Below the ON threshold, the Inhibit control is overridden, and the module does not produce an output. The hysteresis voltage, which is the difference between the ON and OFF threshold voltages, is set at 500 mV. The hysteresis prevents start-up oscillations, which can occur if the input voltage droops slightly when the module begins drawing current from the input source. The UVLO feature of the PTH08T220/221W module allows for limited adjustment of the ON threshold voltage. The adjustment is made via the Inhbit/UVLO Prog control pin (pin 11) using a single resistor (see Figure 21). When pin 11 is left open circuit, the ON threshold voltage is internally set to its default value, which is 4.3 volts. The ON threshold might need to be raised if the module is powered from a tightly regulated 12-V bus. Adjusting the threshold prevents the module from operating if the input bus fails to completely rise to its specified regulation voltage. Equation 5 determines the value of RUVLO required to adjust VTHD to a new value. The default value is 4.3 V, and it may only be adjusted to a higher value. R UVLO + 9690 * ǒ137 ǒ137 VIǓ VIǓ * 585 (kW) (5) Table 7 lists the standard resistor values for RUVLO for different values of the on-threshold (VTHD) voltage. Table 7. Standard RUVLO values for Various VTHD values VTHD 5.0 V RUVLO 5.5 V 6.0 V 6.5 V 7.0 V 7.5 V 8.0 V 8.5 V 9.0 V 9.5 V 10.0 V 10.5 V 11.0 V 88.7 kΩ 52.3 kΩ 37.4 kΩ 28.7 kΩ 23.2 kΩ 19.6 kΩ 16.9 kΩ 14.7 kΩ 13.0 kΩ 11.8 kΩ 10.5 kΩ 9.76 kΩ 8.87 kΩ PTH08T220W/221W VI 2 11 VI Inhibit/UVLO Prog GND 3 CI 4 RUVLO GND Figure 21. Undervoltage Lockout Adjustment Resistor Placement 22 Submit Documentation Feedback Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W PTH08T220W, PTH08T221W www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009 Soft-Start Power Up The Auto-Track feature allows the power-up of multiple PTH/PTV modules to be directly controlled from the Track pin. However in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track pin should be directly connected to the input voltage, VI (see Figure 22). 10 Track VI 2 VI PTH08T220W/221W GND 3,4 CI GND Figure 22. Defeating the Auto-Track Function When the Track pin is connected to the input voltage the Auto-Track function is permanently disengaged. This allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate. From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically 2 ms–10 ms) before allowing the output voltage to rise. VI (5 V/div) VO (2 V/div) II (2 A/div) t − Time − 4 ms/div Figure 23. Power-Up Waveform The output then progressively rises to the module’s setpoint voltage. Figure 23 shows the soft-start power-up characteristic of the PTH08T220/221W operating from a 12-V input bus and configured for a 3.3-V output. The waveforms were measured with a 10-A constant current load and the Auto-Track feature disabled. The initial rise in input current when the input voltage first starts to rise is the charge current drawn by the input capacitors. Power-up is complete within 15 ms. Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W Submit Documentation Feedback 23 PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com On/Off Inhibit For applications requiring output voltage on/off control, the PTH08T220/221W incorporates an Inhibit control pin. The inhibit feature can be used wherever there is a requirement for the output voltage from the regulator to be turned off. The power modules function normally when the Inhibit pin is left open-circuit, providing a regulated output whenever a valid source voltage is connected to VI with respect to GND. Figure 24 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit input has its own internal pull-up. An external pull-up resistor should never be used with the inhibit pin. The input is not compatible with TTL logic devices. An open-collector (or open-drain) discrete transistor is recommended for control. PTH08T220W/221W 2 VI VI 11 Inhibit/ UVLO GND 3,4 CI 1 = Inhibit Q1 BSS 138 GND Figure 24. On/Off Inhibit Control Circuit Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within 15 ms. Figure 25 shows the typical rise in both the output voltage and input current, following the turn-off of Q1. The turn off of Q1 corresponds to the rise in the waveform, VINH. The waveforms were measured with a 10-A constant current load. VO (2 V/div) II (2 A/div) VINH (2 V/div) t − Time − 4 ms/div Figure 25. Power-Up Response from Inhibit Control 24 Submit Documentation Feedback Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W PTH08T220W, PTH08T221W www.ti.com................................................................................................................................................... SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009 Overcurrent Protection For protection against load faults, all modules incorporate output overcurrent protection. Applying a load that exceeds the regulator's overcurrent threshold causes the regulated output to shut down. Following shutdown, the module periodically attempts to recover by initiating a soft-start power-up. This is described as a hiccup mode of operation, whereby the module continues in a cycle of successive shutdown and power up until the load fault is removed. During this period, the average current flowing into the fault is significantly reduced. Once the fault is removed, the module automatically recovers and returns to normal operation. Overtemperature Protection (OTP) A thermal shutdown mechanism protects the module’s internal circuitry against excessively high temperatures. A rise in the internal temperature may be the result of a drop in airflow, or a high ambient temperature. If the internal temperature exceeds the OTP threshold, the module’s Inhibit control is internally pulled low. This turns the output off. The output voltage drops as the external output capacitors are discharged by the load circuit. The recovery is automatic, and begins with a soft-start power up. It occurs when the sensed temperature decreases by about 10°C below the trip point. The overtemperature protection is a last resort mechanism to prevent thermal stress to the regulator. Operation at or close to the thermal shutdown temperature is not recommended and reduces the long-term reliability of the module. Always operate the regulator within the specified safe operating area (SOA) limits for the worst-case conditions of ambient temperature and airflow. Differential Output Voltage Remote Sense Differential remote sense improves the load regulation performance of the module by allowing it to compensate for any IR voltage drop between its output and the load in either the positive or return path. An IR drop is caused by the output current flowing through the small amount of pin and trace resistance. With the sense pins connected, the difference between the voltage measured directly between the VO and GND pins, and that measured at the Sense pins, is the amount of IR drop being compensated by the regulator. This should be limited to a maximum of 0.3V. Connecting the +Sense (pin 6) to the positive load terminal improves the load regulation at the connection point. For optimal behavior the –Sense (pin 7) must be connected to GND (pin 4) close to the module (within 10 cm). If the remote sense feature is not used at the load, connect the +Sense pin to VO (pin5) and connect the –Sense pin to the module GND (pin 4). The remote sense feature is not designed to compensate for the forward drop of nonlinear or frequency dependent components that may be placed in series with the converter output. Examples include OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the remote sense connection they are effectively placed inside the regulation control loop, which can adversely affect the stability of the regulator. Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T220W PTH08T221W Submit Documentation Feedback 25 PTH08T220W, PTH08T221W SLTS252K – NOVEMBER 2005 – REVISED JUNE 2009................................................................................................................................................... www.ti.com Smart Sync Smart Sync is a feature that allows multiple power modules to be synchronized to a common frequency. Driving the Smart Sync pins with an external oscillator set to the desired frequency, synchronizes all connected modules to the selected frequency. The synchronization frequency can be higher or lower than the nominal switching frequency of the modules within the range of 240 kHz to 400 kHz. Synchronizing modules powered from the same bus eliminates beat frequencies reflected back to the input supply, and also reduces EMI filtering requirements. Eliminating the low beat frequencies (usually