DATASHEET ISL6261 FN9251 Rev 1.00 Single-Phase Core Regulator for IMVP-6 Mobile CPUs Sep 27, 2006 The ISL6261 is a single-phase buck regulator implementing Features lntel IMVP-6 protocol, with embedded gate drivers. Precision single-phase CORE voltage regulator 3 The heart of the ISL6261 is the patented R Technology, - 0.5% system accuracy over temperature Intersils Robust Ripple Regulator modulator. Compared with - Enhanced load line accuracy 3 the traditional multi-phase buck regulator, the R Internal gate driver with 2A driving capability Technology has faster transient response. This is due to 3 the R modulator commanding variable switching frequency Microprocessor voltage identification input during a load transient. - 7-Bit VID input - 0.300V to 1.500V in 12.5mV steps lntel Mobile Voltage Positioning (IMVP) is a smart voltage - Support VID change on-the-fly regulation technology effectively reducing power dissipation in lntel Pentium processors. To boost battery life, the Multiple current sensing schemes supported ISL6261 supports DPRSLRVR (deeper sleep) function and - Lossless inductor DCR current sensing maximizes the efficiency via automatically changing - Precision resistive current sensing operation modes. At heavy load in the active mode, the Thermal monitor regulator commands the continuous conduction mode (CCM) operation. When the CPU enters deeper sleep mode, User programmable switching frequency the ISL6261 enables diode emulation to maximize the Differential remote voltage sensing at CPU die efficiency at light load. Asserting the FDE pin of the ISL6261 in deeper sleep mode will further decrease the switching Overvoltage, undervoltage, and overcurrent protection frequency at light load and increase the regulator efficiency. Pb-free plus anneal available (RoHS compliant) A 7-bit digital-to-analog converter (DAC) allows dynamic Ordering Information adjustment of the core output voltage from 0.300V to 1.500V. The ISL6261 has 0.5% system voltage accuracy over TEMP temperature. PART NUMBER PART RANGE PACKAGE PKG. (NOTE) MARKING (C) (Pb-FREE) DWG. A unity-gain differential amplifier provides remote voltage ISL6261CRZ ISL6261CRZ -10 to +100 40 Ld 6x6 L40.6x6 sensing at the CPU die. This allows the voltage on the CPU QFN die to be accurately measured and regulated per lntel ISL6261CRZ-T ISL6261CRZ -10 to +100 40 Ld 6x6 L40.6x6 IMVP-6 specification. Current sensing can be implemented QFN, T&R through either lossless inductor DCR sensing or precise resistor sensing. If DCR sensing is used, an NTC thermistor ISL6261CR7Z ISL6261CR7Z -10 to +100 48 Ld 7x7 L48.7x7 QFN network will thermally compensates the gain and the time constant variations caused by the inductor DCR change. ISL6261CR7Z-T ISL6261CR7Z -10 to +100 48 Ld 7x7 L48.7x7 QFN, T&R ISL6261IRZ ISL6261IRZ -40 to +100 40 Ld 6x6 L40.6x6 QFN ISL6261IRZ-T ISL6261IRZ -40 to +100 40 Ld 6x6 L40.6x6 QFN, T&R ISL6261IR7Z ISL6261IR7Z -40 to +100 48 Ld 7x7 L48.7x7 QFN ISL6261IR7Z-T ISL6261IR7Z -40 to +100 48 Ld 7x7 L48.7x7 QFN, T&R NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. FN9251 Rev 1.00 Page 1 of 34 Sep 27, 2006ISL6261 Pinouts ISL6261 (40 LD QFN) 40 39 38 37 36 35 34 33 32 31 FDE 1 30 VID2 PGD IN 2 29 VID1 RBIAS 3 28 VID0 VR TT 4 27 VCCP NTC 5 26 LGATE GND PAD (BOTTOM) SOFT 6 25 VSSP OCSET 7 24 PHASE VW 8 23 UGATE COMP 9 22 BOOT FB 10 21 NC 11 12 13 14 15 16 17 18 19 20 ISL6261 (48 LD QFN) 48 47 46 45 44 43 42 41 40 39 38 37 PGOOD 1 36 NC 2 35 FDE NC 3 34 PGD IN NC RBIAS 4 33 NC VR TT 5 32 NC NTC 6 31 VCCP GND PAD (BOTTOM) 7 30 SOFT LGATE OCSET 8 29 VSSP VW 9 28 PHASE COMP UGATE 10 27 FB 11 26 BOOT NC 12 25 NC 13 14 15 16 17 18 19 20 21 22 23 24 FN9251 Rev 1.00 Page 2 of 34 Sep 27, 2006 VDIFF 3V3 VSEN CLK EN VDIFF PGOOD RTN DPRSTP VSEN 3V3 DROOP DPRSLPVR RTN CLK EN DFB VR ON DROOP DPRSTP VO VID6 DFB DPRSLPVR VSUM VID5 VO VR ON VIN VID4 VSUM VID6 VID3 VSS VIN VID5 VID2 VDD VSS VID4 VID1 NC VDD VID3 VID0 NC