ISL62881C, ISL62881D Single-Phase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs ISL62881C, ISL62881D Features Precision Core Voltage Regulation The ISL62881C provides a complete solution for - 0.5% System Accuracy Over-Temperature microprocessor and graphic processor core power supply with its integrated gate drive. Based on Intersils Robust - Enhanced Load Line Accuracy Ripple regulator (R3) technology, the PWM modulator Supports Multiple Current Sensing Methods compared to traditional modulators, has faster transient - Lossless Inductor DCR Current Sensing settling time, variable switching frequency during load transients and has improved light load efficiency with its - Precision Resistor Current Sensing ability to automatically change switching frequency. Current Monitor Fully compliant with IMVP6.5, the ISL62881C is easily Differential Remote Voltage Sensing configurable as a CPU or graphics V controllers by CORE Integrated Gate Driver offering: responds to DPRSLPVR signals by Split LGATE Driver to Increase Light-Load Efficiency entering/exiting diode emulations mode reports (For ISL62881D) regulator output current via the IMON pin senses current by using a discrete resistor or the inductor Adaptive Body Diode Conduction Time Reduction over-temperature thermal compensation of DCR, using a User-selectable Overshoot Reduction Function single NTC thermistor differential sensing to accurately Small Footprint 28 Ld 4x4 or 32 Ld 5x5 TQFN monitor and adjust processor die voltage minimizes Package body diode conduction loss in diode 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 ISL62881D See AN1552 for Evaluation Board Application Note offers VR TT function for thermal throttling control. It ISL62881CCPUEVAL2Z User Guide also offers the split LGATE function to further improve See AN1553 for Evaluation Board Application Note 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 March 8, 2010 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc. FN7596.0 Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. V (V) OUTISL62881C, ISL62881DISL62881C, 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. FN7596.0 2 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