DATASHEET ISL62881C, ISL62881D FN7596 Rev 0.00 Single-Phase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs March 8, 2010 The ISL62881C provides a complete solution for Features microprocessor and graphic processor core power Precision Core Voltage Regulation supply with its integrated gate drive. Based on - 0.5% System Accuracy Over-Temperature Intersils Robust Ripple regulator (R3) technology, the PWM modulator compared to traditional - Enhanced Load Line Accuracy modulators, has faster transient settling time, variable Supports Multiple Current Sensing Methods switching frequency during load transients and has - Lossless Inductor DCR Current Sensing improved light load efficiency with its ability to automatically change switching frequency. - Precision Resistor Current Sensing Fully compliant with IMVP6.5, the ISL62881C is Current Monitor easily configurable as a CPU or graphics V CORE Differential Remote Voltage Sensing controllers by offering: responds to DPRSLPVR signals Integrated Gate Driver by entering/exiting diode emulations mode reports Split LGATE Driver to Increase Light-Load regulator output current via the IMON pin senses Efficiency (For ISL62881D) current by using a discrete resistor or the inductor over-temperature thermal compensation of DCR, using Adaptive Body Diode Conduction Time Reduction a single NTC thermistor differential sensing to User-selectable Overshoot Reduction Function accurately monitor and adjust processor die voltage Small Footprint 28 Ld 4x4 or 32 Ld 5x5 TQFN minimizes body diode conduction loss in diode Package emulation mode with its adaptive body diode conduction time. Applications Need to aggressively reduce the output capacitor The Notebook Core Voltage Regulator overshoot reduction function is user-selectable and can Notebook GPU Voltage Regulator be disabled for those concerned about increased system thermal stress. Related Literature Maintaining all the ISL62881C functions, the See AN1552 for Evaluation Board Application Note ISL62881D offers VR TT function for thermal ISL62881CCPUEVAL2Z User Guide throttling control. It also offers the split LGATE function See AN1553 for Evaluation Board Application Note to further improve light load efficiency. ISL62881CGPUEVAL2Z User Guide Load Line Regulation 0.91 V = 19V IN 0.90 0.89 0.88 0.87 0.86 0.85 0.84 0.83 V = 12V IN 0.82 V = 8V IN 0.81 0.80 02 468 10 12 14 16 18 20 22 I (A) OUT FN7596 Rev 0.00 Page 1 of 37 March 8, 2010 V (V) OUTISL62881C, ISL62881D Ordering Information PART NUMBER TEMP. RANGE PACKAGE PKG. (Notes 1, 2, 3) PART MARKING (C) (Pb-Free) DWG. ISL62881CHRTZ 62881C HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4 ISL62881CIRTZ 62881C IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4 ISL62881DHRTZ 62881D HRTZ -10 to +100 32 Ld 5x5 TQFN L32.5x5E NOTES: 1. Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL62881C, ISL62881D. For more information on MSL please see techbrief TB363. Pin Configurations ISL62881C ISL62881D (28 LD TQFN) (32 LD TQFN) TOP VIEW TOP VIEW 28 27 26 25 24 23 22 32 31 30 29 28 27 26 25 VID1 1 21 CLK EN VID1 PGOOD 1 24 PGOOD 2 20 VID0 RBIAS 2 23 VID0 RBIAS 3 19 VCCP VCCP VR TT 3 22 LGATE VW 4 18 GND PAD NTC 4 21 LGATEb GND PAD (BOTTOM) COMP 5 17 VSSP (BOTTOM) GND 5 20 LGATEa FB 6 16 PHASE VW VSSP 6 19 VSEN 7 15 UGATE COMP 7 18 PHASE FB 8 9 10 11 12 13 14 8 17 UGATE 910 11 12 13 14 15 16 Pin Function Description ISL62881C ISL62881D SYMBOL DESCRIPTION 1 32 CLK EN Open drain output to enable system PLL clock. It goes low 13 switching cycles after V is within 10% of V . CORE BOOT 2 1 PGOOD Power-Good open-drain output indicating when the regulator is able to supply regulated voltage. Pull up externally with a 680 resistor to VCCP or 1.9k to 3.3V. 3 2 RBIAS A resistor to GND sets internal current reference. A 147k resistor sets the controller for CPU core application and a 47k resistor sets the controller for GPU core application. - 3 VR TT Thermal overload output indicator. - 4 NTC Thermistor input to VR TT circuit. - 5 GND Signal common of the IC. Unless otherwise stated, signals are referenced to the GND pin. FN7596 Rev 0.00 Page 2 of 37 March 8, 2010 RTN DPRSLPVR VR ON ISUM- VID6 ISUM+ 5 VDD VID VID4 VIN VID3 IMON OOT VID2 B CLK EN VSEN DPRSLPVR RTN VR ON UM- IS VID6 ISUM+ VID5 VDD VID4 VIN VID3 IMON VID2 BOOT