DATASHEET ISL62882, ISL62882B FN6890 Rev 4.00 Multiphase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs June 21, 2011 The ISL62882 is a multiphase PWM buck regulator for Features miroprocessor or graphics processor core power supply. The Programmable 1- or 2-Phase CPU Mode Operation or multiphase buck converter uses interleaved phases to reduce the 1-Phase GPU Mode Operation total output voltage ripple with each phase carrying a portion of the total load current, providing better system performance, Precision Multiphase Core Voltage Regulation superior thermal management, lower component cost, reduced - 0.5% System Accuracy Over-Temperature power dissipation, and smaller implementation area. The - Enhanced Load Line Accuracy ISL62882 uses two integrated gate drivers to provide a complete Microprocessor Voltage Identification Input solution. The PWM modulator is based on Intersil s Robust Ripple 3 Regulator (R ) technology. Compared with traditional - 7-Bit VID Input, 0V to 1.500V in 12.5mV Steps 3 modulators, the R modulator commands variable switching - Supports VID Changes On-The-Fly frequency during load transients, achieving faster transient Supports Multiple Current Sensing Methods response. With the same modulator, the switching frequency is reduced at light load, increasing the regulator efficiency. - Lossless Inductor DCR Current Sensing - Precision Resistor Current Sensing The ISL62882 can be configured as CPU or graphics Vcore controller and is fully compliant with IMVP-6.5 specifications. It Supports PSI and DPRSLPVR modes responds to PSI and DPRSLPVR signals by adding or dropping Superior Noise Immunity and Transient Response Phase 2, adjusting overcurrent protection threshold accordingly, Current Monitor and Thermal Monitor and entering/exiting diode emulation mode. It reports the regulator output current through the IMON pin. It senses the Differential Remote Voltage Sensing current by using either discrete resistor or inductor DCR whose High Efficiency Across Entire Load Range variation over temperature can be thermally compensated by a single NTC thermistor. It uses differential remote voltage sensing Programmable 1- or 2-Phase Operation to accurately regulate the processor die voltage. The unique split Two Integrated Gate Drivers LGATE function further increases light load efficiency. The Excellent Dynamic Current Balance Between Phases adaptive body diode conduction time reduction function minimizes the body diode conduction loss in diode emulation Split LGATE1 Drivers Increases Light Load Efficiency mode. User-selectable overshoot reduction function offers an FB2 Function Optimizes 1-Phase Mode Performance option to aggressively reduce the output capacitors as well as the Adaptive Body Diode Conduction Time Reduction option to disable it for users concerned about increased system thermal stress. The ISL62882 offers the FB2 function to optimize User-selectable Overshoot Reduction Function 1-phase performance. Small Footprint 40 Ld 5x5 or 48 Ld 6x6 TQFN Packages The ISL62882B has the same functions as the ISL62882, but Pb-Free (RoHS Compliant) comes in a different package. Applications Notebook Core Voltage Regulator Notebook GPU Voltage Regulator Ordering Information PART NUMBER TEMP. RANGE PACKAGE PKG. (Notes 1, 2, 3) PART MARKING (C) (Pb-Free) DWG. ISL62882IRTZ 62882 IRTZ -40 to +100 40 Ld 5x5 TQFN L40.5x5 ISL62882HRTZ 62882 HRTZ -10 to +100 40 Ld 5x5 TQFN L40.5x5 ISL62882BHRTZ 62882 BHRTZ -10 to +100 48 Ld 6x6 TQFN L48.6x6 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 ISL62882, ISL62882B. For more information on MSL please see techbrief TB363. FN6890 Rev 4.00 Page 1 of 41 June 21, 2011ISL62882, ISL62882B Pin Configurations ISL62882 ISL62882B (40 LD TQFN) (48 LD TQFN) TOP VIEW TOP VIEW 48 47 46 45 44 43 42 41 40 39 38 37 40 39 38 37 36 35 34 33 32 31 1 36 NC BOOT2 1 30 BOOT2 PGOOD PGOOD 2 35 UGATE2 PSI 2 29 UGATE2 PSI 3 34 PHASE2 RBIAS PHASE2 3 28 4 33 RBIAS VSSP2 VR TT VSSP2 4 27 VR TT 5 32 LGATE2 LGATE2 NTC 5 26 NTC 6 31 NC GND PAD (BOTTOM) (BOTTOM) 7 30 VCCP VW VCCP GND 6 25 8 29 LGATE1b VW COMP 7 24 LGATE1b 9 28 COMP LGATE1a FB 8 23 LGATE1a FB 10 27 VSSP1 FB2 9 22 VSSP1 FB2 11 26 PHASE1 ISEN2 10 21 PHASE1 12 25 NC UGATE1 11 12 13 14 15 16 17 18 19 20 13 14 15 16 17 18 19 20 21 22 23 24 Functional Pin Descriptions ISL62882 ISL62882B SYMBOL DESCRIPTION - 7 GND Signal common of the IC. Unless otherwise stated, signals are referenced to the GND pin. 1 2 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. 2 3 PSI Low load current indicator input. When asserted low, indicates a reduced load current condition. 3 4 RBIAS A resistor to GND sets internal current reference. Use 147k or 47k . The choice of Rbias value, together with the ISEN2 pin configuration and the external resistance from the COMP pin to GND, programs the controller to enable/disable the overshoot reduction function and to select the CPU/GPU mode. 4 5 VR TT Thermal overload output indicator. 5 6 NTC Thermistor input to VR TT circuit. 6 8 VW A resistor from this pin to COMP programs the switching frequency (8k gives approximately 300kHz). 7 9 COMP This pin is the output of the error amplifier. Also, a resistor across this pin and GND adjusts the overcurrent threshold. 8 10 FB This pin is the inverting input of the error amplifier. 9 11 FB2 There is a switch between the FB2 pin and the FB pin. The switch is on in 2-phase mode and is off in 1-phase mode. The components connecting to FB2 are used to adjust the compensation in 1-phase mode to achieve optimum performance. 10 13 ISEN2 Individual current sensing for Phase 2. When ISEN2 is pulled to 5V VDD, the controller will disable Phase 2. 11 14 ISEN1 Individual current sensing for phase 1. 12 15 VSEN Remote core voltage sense input. Connect to microprocessor die. FN6890 Rev 4.00 Page 2 of 41 June 21, 2011 CLK EN DPRSLPVR VR ON VID6 VID5 VID4 VID3 VID2 VID1 VID0 ISEN1 VSEN RTN ISUM- ISUM+ VDD VIN IMON BOOT1 UGATE1 ISEN2 NC ISEN1 CLK EN VSEN DPRSLPVR RTN VR ON ISUM- VID6 ISUM+ VID5 VDD VID4 VIN VID3 NC VID2 IMON VID1 NC VID0 NC BOOT1