MP86883GQKT-Z

TM MP86883 Intelli-Phase Solution (Integrated HS/LS FETs and Driver) in 6x6mm TQFN The Future of Analog IC Technology DESCRIPTION The MP86883 is a monolithic half-bridge with built-in internal power MOSFETs and gate drivers. It achieves 55A of continuous output current over a wide input supply range. Integration of the driver and MOSFETS results in high efficiency due to optimal dead time control and parasitic inductance reduction. The MP86883 is a Monolithic IC approach to drive up to 55A per phase. This very small TQFN-34 (6mm x 6mm) device can operate from 100kHz to 1MHz. This device works with tri-state output controllers. It also comes with a generalpurpose current sense and temperature sense. The MP86883 is ideal for server applications where efficiency and small size are a premium. FEATURES            Wide 4.5V to 14V Operating Input Range Simple Logic Interface 55A Output Current Accepts Tri-State PWM Signal Built-In Switch for Bootstrap Current Sense Current Limit Protection Temperature Sense and Protection Fault Reporting Used for Multi-Phase Operation Available in TQFN-34 (6mm x 6mm) Package APPLICATIONS    Server/Workstation/Desktop Core Voltage Graphic Card Core Regulators Power Modules All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. Intelli-Phase is Trademark of Monolithic Power Systems, Inc. TYPICAL APPLICATION 95 90 85 80 75 70 0 5 10 15 20 25 30 35 40 45 50 55 MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN ORDERING INFORMATION Part Number* Package TQFN-34 (6mmx6mm) MP86883GQKT Top Marking MP86883 * For Tape & Reel, add suffix –Z (e.g. MP86883GQKT–Z); T1 VTEMP EN PGND PGND CS FAULT# RIN PGND PGND PGND AGND PGND PGND VDD PGND PGND SYNC PGND PWM BST VDRV PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) Supply Voltage VIN ........................................ 16V VSW (DC) ............................................... -1 V to 16V VSW (25ns) .............................................. -3V to 23V VBST........................................................ VSW + 6V All Other Pins .................................. -0.3V to +6V Instantaneous Current ............................... 100A Continuous Power Dissipation (TA =+25°C)(2) ............................................................... 4.3W Junction Temperature ............................... 150°C Lead Temperature .................................... 260°C Storage Temperature ................-65°C to +150°C TQFN-34 (6mmx6mm)..……..…29……8…..°C/W Recommended Operating Conditions (3) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. Supply Voltage VIN ........................... 4.5V to 14V Driver Voltage VDRV ......................... 4.5V to 5.5V Logic Voltage VDD ........................... 4.5V to 5.5V Operating Junction Temp. (TJ). -40°C to +125°C MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN ELECTRICAL CHARACTERISTICS (5) VIN = 12V, VDRV=VDD=5V, TA = -40°C to 125°C, unless otherwise noted. Parameters IIN Shutdown Symbol IIN (Off) IIN Standby IIN (Standby) VIN Under Voltage Lockout Threshold Rising VIN Under Voltage Lockout Threshold Hysteresis IDRV Quiescent Current IDRV Shutdown Current IDD Quiescent Current IDD Shutdown Current VDD Voltage UVLO Rising VDD Voltage UVLO Hysteresis High Side Current Limit(5) Low Side Current Limit(5) EN Input Low Voltage EN Input High Voltage Dead-Time Rising(5) Dead-Time Falling(5) SYNC Current SYNC Logic High Voltage SYNC Logic Low Voltage PWM High to SW Rising Delay(5) PWM Low to SW Falling Delay(5) Condition VDRV=VDD=0V VDRV=VDD=5V, PWM=EN=Low Min Typ 55 Max 60 4 μA 4.4 300 IDRV (Quiescent) IDRV Shutdown IDD (Quiescent) IDD Shutdown PWM Tristate to SW Hi-Z Delay(5) PWM Logic High Voltage PWM Tristate Region(5) PWM Logic Low Voltage PWM=Low 4.4 0.4 2 ISYNC 3 8 -65 VSYNC=0V 2 0.4 tLT tTL tHT tTH IOUT=30A IPWM VPWM=3.3V, VEN=5V VPWM=0V, VEN=5V 2.65 1 V mV 500 250 2.4 70 4 300 80 -30 ILIM Minimum PWM Pulse Width(5) Current Sense Accuracy(5) Current Sense Gain Temperature Sense Gain(6) Temperature Sense Offset(6) Over Temperature Flag(5) Over Temperature Hysteresis(5) PWM Input Current PWM=Low Units μA μA μA mA μA V mV A A V V ns ns μA V V ns ns 35 35 60 50 75 50 30 ±4 10 10 -100 170 30 ns % μA/A mV/°C mV °C °C 95 μA -95 μA V V V ns 1.7 0.40 Notes: 5) Guaranteed by design. 6) See “Junction Temperature Sense” section for details. MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN MP86883 Rev. 0.8 www.MonolithicPower.com 8/31/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2020 MPS. All Rights Reserved. 4 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN TYPICAL CHARACTERISTICS 5 4 4.8 3.9 4.6 3.8 4.4 3.7 4.2 3.6 4.0 3.8 3.5 3.6 3.3 3.4 3.2 3.2 3.1 3 -60 1. 5 1. 4 1. 3 3.4 -20 20 60 100 140 3 -60 1. 2 1. 1 -20 20 60 100 140 1 -60 10 1.5 80 9.5 1.4 70 1.3 60 8 1.2 50 7.5 1.1 40 7 1 30 0.9 20 0.8 10 9 8.5 6.5 6 5.5 5 -60 -20 20 60 -20 20 60 100 140 0.7 -60 -20 20 60 100 140 0 -60 -20 20 60 100 140 -20 20 60 100 140 3 2.5 2 1.5 1 0.5 0 -60 MP86883 Rev. 1.0 8/31/2020 100 140 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=12V, VOUT=1.2V, VDRV= VDD=5V, L=215nH, FSW=600kHz, TA=25°C, no droop, unless otherwise noted. Normalized Power Loss vs. Output Voltage 95 12 90 10 1.30 1.15 8 LOSS (W) 85 80 70 0 NORMALIZED LOSS (W) 1.25 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 300 400 500 600 700 800 900 1000 FSW (kHz) 1.00 0.95 0.90 0.85 0.80 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 VOUT (V) 0 5 10 15 20 25 30 35 40 45 50 55 IOUT (A) Normalized Power Loss vs. Inductance 1.30 1.20 1.05 4 2 0 5 10 15 20 25 30 35 40 45 50 55 IOUT (A) 1.10 6 75 Normalized Power Loss vs. Switching Frequency NORMALIZED LOSS (W) 1.20 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 1.04 1.02 1.00 0.98 0.96 0.94 0.92 0.90 100 150 200 250 300 350 400 450 500 60 55 400 FPM 50 45 IOUT (A) EFFICIENCY (%) 1.25 40 35 30 200 FPM No Airflow 25 20 15 10 0 10 20 30 40 50 60 70 80 90 Safe Operating Area With Heat Sink 60 400 FPM 55 IOUT (A) 50 45 200 FPM 40 35 No Airflow 30 25 20 15 10 0 10 20 30 40 50 60 70 80 90 MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 6 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN PIN FUNCTIONS Pin # 1-6 Name SW 7 VDRV 8-21 PGND 22-23 IN 24 25 EN VTEMP 26 FAULT# 27 28 T1 CS 29 RIN 30 AGND 31 VDD 32 PWM 33 SYNC 34 BST MP86883 Rev. 1.0 8/31/2020 Description Switch Output. Driver Voltage. Connect to 5V supply and decouple with 1µF to 4.7µF ceramic capacitor. Power Ground. Supply Voltage. Place CIN close to the device to prevent large voltage spikes at the input. Enable. Pull low to place SW in a high impedance state. Single pin temperature sense output. Fault reporting on HS current limit, Over Temperature and VDD UVLO. It is an open drain output during normal operation and pull-low when fault occurred. Test pin. Connect to ground. Current Sense Output. Requires an external resistor. Current Sense High Side Current Compensation pin. Connect through a resistor to IN. Analog Ground. Internal Circuitry Voltage. Connect to VDRV thru 2.2Ω resistor and decouple with 1µF capacitor to AGND. Connect AGND and PGND at this point. Pulse Width Modulation. Leave PWM floating or drive to mid-state to put SW in high impedance state. Synchronous Low Switch. Leave open or pull high to enable. Pull low to enter diode emulation mode. Bootstrap. Requires a 0.22µF to 1µF capacitor to drive the power switch’s gate above the supply voltage. Connects between SW and BST pins to form a floating supply across the power switch driver. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 7 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN BLOCK DIAGRAM VDRV VDD BST IN EN HS Current Limit Level Shift Tri-State Enable EN PWM Internal PWM SYNC SW Control Logic RIN HS Current Limit Tri-State Enable PWM Tri-State Enable SYNC HS Current Limit T1 HSFET Internal PWM VDRV Delay EN LSFET AGND SW + PGND - Outputs 1 after inductor current zero crossing Negative Current Limit SW + - Outputs 1 if SW>1.5V 1.5V Temperature Sense Current Sense VTEMP CS FAULT# SW PGND PGND Figure 1: Functional Block Diagram MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN OPERATION The MP86883 is a 55A monolithic half-bridge driver with MOSFETs ideally suited for multiphase buck regulators. When the EN transitions from low to high and both VDD and VBST signals are sufficiently high, operation begins. It is recommended to use EN pin to startup and shutdown the Intelli-Phase. To put SW node in a high impedance state, let PWM pin float or drive PWM pin to mid-state. Drive the SYNC pin low to enter diode emulation mode. In diode emulation mode, the LSFET is off after inductor current crossed zero current. When HSFET over current is detected, the part will latch off. Recycling Vdd or toggling EN will release the latch and restart the device. When the LSFET detects a -30A current, the part will turn off the LSFET for that cycle. When Intelli-Phase detects over temperature, it will turn off both HS and LS MOSFET and latch off. Toggle Vdd or EN to restart the device. Current Sense The CS pin is a bi-directional current source proportional to the inductor current. Use the following equations to select the RIN resistance to connect between RIN pin and IN pin: RIN  7.55  IL _ RIPPLE  170(k) IL _ RIPPLE  t ON  (VIN  VOUT ) VOUT  (VIN  VOUT )  L VIN  FSW  L Where IL_RIPPLE is the peak to peak inductor ripple current. For example, if the ripple current is 10A, then the calculated RIN is 94.5kΩ and 95.3kΩ (the closest 1% resistor value) should be selected for RIN. The CS voltage range of 1V to 3.5V is required to keep CS’s output current linearly proportional to inductor current. Use the following equations to determine a proper reference voltage and/or RCS value: 1V  ICS  RCS  VREF  3.5V ICS  IL  10  106 Intelli-Phase’s current sense output can be used by controller to accurately monitor the output current. The cycle-by-cycle current information from CS pin can be used for phase current balancing, over current protection and active voltage positioning (output voltage droop). Intelli-Phase’s accurate current sense can replace traditional inductor DCR current sensing scheme. In traditional inductor DCR current sense: VCS  IL  RDCR With Intelli-Phase’s CS output, VCS becomes: VCS  ICS  RCS  IL  RCS  10  10 6 term is replaced Where the RDCR 6 with RCS  10  10 . Figure 2 shows a circuit replacing inductor DCR sensing with IntelliPhase’s CS output. There are several advantages with this current sensing method: 1. Since current sensing is done by IntelliPhase, user can select low DCR inductors and still have large current sense signal by selecting larger RCS. 2. Tight DCR variation is not required. 3. CS signal is independent of impedance matching and inductor temperature. The current sense gain is 10μA/A. In general, there is a resistor, RCS, connected from CS pin and VOUT or an external voltage which is capable to sink small current to provide enough voltage shift to meet the operating voltage on CS pin. MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN Figure 2: Replacing DCR Current Sense with Intelli-Phase’s CS Output Junction Temperature Sense The VTEMP pin is a voltage output proportional to the junction temperature. The junction temperature can be calculated from the following equation: TJUNCTION   VTEMP  100mV  , 10mV o C Be sure to measure this voltage between VTEMP and AGND pins for the most accurate reading. In multi-phase operation, the VTEMP pins of every Intelli-Phase can be connected to the temperature monitor pin of the controller. A sample circuitry is shown in Figure 3. VTEMP signals can also be used for system thermal protection as shown in Figure 4. for TJUNCTION>10oC For example, if the VTEMP voltage is 700mV, then the junction temperature of Intelli-Phase is 80oC. VTEMP can not go below 0V, so it will read 0V for junction temperature lower than 10oC. MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN Intelli-Phase Power Stage Vin IntelliPhase Vin L2 VOUT VTEMP Multi-Phase Controller C OUT PWM PWM2 Temperature ADC Vin IntelliPhase Vin L1 VTEMP PWM PWM1 Figure 3: Multi-Phase Temperature Sense Utilization Program R1 and R2 to set the protection temperature VTEMP1 For System Protection R1 VTEMP2 NPN R2 Figure 4: System Thermal Protection MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN PCB Layout Guide Line PCB layout plays an important role to achieve stable operation. For optimal performance, follow these guidelines. 1. Always place some input bypass ceramic capacitors next to the device and on the same layer as the device. Do not put all of the input bypass capacitors on the back side of the device. Use as many via and input voltage planes as possible to reduce switching spikes. Place the BST capacitor and the VDRV capacitor as close to the device as possible. 2. Place the VDD decoupling capacitor close to the device. Connect AGND and PGND at the point of VDD capacitor's ground connection. 3. It is recommended to use 0.22µF to 1µF bootstrap capacitor and 3.3Ω bootstrap resistance. Do not use capacitance values below 100nF for the BST capacitor. MP86883 Rev. 1.0 8/31/2020 4. Connect IN, SW and PGND to large copper areas and use via to cool the chip to improve thermal performance and long-term reliability. 5. Keep the path of switching current short and minimize the loop area formed by the input capacitor. Keep the connection between the SW pin and the input power ground as short and wide as possible. CBST VIN SW CIN PGND CVDRV www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 12 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN TYPICAL APPLICATION CIRCUITS Figure 5: 4-Phase Intelli-Phase with MP2935 VR12.5 Controller MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 13 MP86883 – INTELLI-PHASE SOLUTION IN 6x6mm TQFN PACKAGE INFORMATION TQFN-34 (6mm x 6mm) NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP86883 Rev. 1.0 8/31/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 14