ISL6315 Data Sheet July 18, 2007 FN9222.1 Two-Phase Multiphase Buck PWM Features Controller with Integrated MOSFET Integrated Two-Phase Power Conversion Drivers 5V to 12V Input Voltage Conversion The ISL6315 two-phase PWM control IC provides a Precision Channel Current Sharing precision voltage regulation system for advanced loads up to - Loss-Less Current Sampling - Uses r 60A to 80A. Multiphase power conversion is a marked DS(ON) departure from single phase converter configurations Precision Output Voltage Regulation employed to satisfy the increasing current demands of - 1% System Accuracy Over-Temperature (Commercial) modern microprocessors and other electronic circuits. By Microprocessor Voltage Identification Inputs distributing the power and load current, implementation of - Up to a 6-Bit DAC multiphase converters utilize smaller and lower cost - Selectable between Intels VRM9, VRM10, or AMDs transistors with fewer input and output capacitors. These Hammer DAC codes reductions accrue from the higher effective conversion frequency with higher frequency ripple current due to the Fast Transient Recovery Time phase interleaving process of this topology. Overcurrent Protection Outstanding features of this controller IC include programmable Pre-Biased Output Start-up Operation VID codes compatible with Intel VRM9, VRM10, as well as AMDs Hammer microprocessors, along with a system Sources and Sinks Output Current regulation accuracy of 1%. The ISL6315, though, does not - Bus Termination Applications intrinsically allow for load-line regulation (no droop). Improved, Multi-tiered Overvoltage Protection Important features of this controller IC include a set of QFN Package: sophisticated overvoltage and overcurrent protection. - Compliant to JEDEC PUB95 MO-220 Overvoltage results in the converter turning the lower QFN - Quad Flat No Leads - Package Outline MOSFETs ON to clamp the rising output voltage and protect - Near Chip Scale Package footprint, which improves the microprocessor. Like other Intersil multiphase PCB efficiency and has a thinner profile controllers, the ISL6315 uses cost and space-saving Pb-Free Plus Anneal Available (RoHS Compliant) r sensing for channel current balance and DS(ON) overcurrent protection. Channel current balancing is Pinout automatic and accurate with the integrated current-balance ISL6315 control system. Overcurrent protection can be tailored to any (24 LD QFN) application with no need for additional parts. These features TOP VIEW provide intelligent protection for modern power systems. Ordering Information PART PART TEMP. PKG. 24 23 22 21 20 19 NUMBER MARKING (C) PACKAGE DWG. VID1 1 18 PHASE1 ISL6315CR* ISL6315CR 0 to +70 24 Ld 4x4 QFN L24.4x4B 17 VID0 2 LGATE1 ISL6315CRZ* 6315CRZ 0 to +70 24 Ld 4x4 QFN L24.4x4B (Note) (Pb-free) DACSEL/VID5 3 16 PVCC 25 ISL6315IRZ* 6315IRZ -40 to +85 24 Ld 4x4 QFN L24.4x4B GND VRM10 4 15 LGATE2 (Note) (Pb-free) *Add -T or -TK suffix for tape and reel. Please refer to TB347 for COMP 5 14 PGND details on reel specifications. FB 6 13 PHASE2 NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate 78 9 10 11 12 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. **Contact Factory for Availability. 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. Copyright Intersil Americas Inc. 2006-2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISEN VID2 VCC VID3 OFS VID4 SSEND ENLL BOOT2 BOOT1 UGATE2 UGATE1ISL6315 FN9222.1 2 July 18, 2007 Block Diagram SSEND ENLL VCC PVCC BOOT1 OVP WHILE DISABLED 1.65V/1.95V + - UGATE1 POWER-ON OVP RESET (POR) OSCILLATOR PHASE1 GATE + CONTROL 200mV - COMP LGATE1 VID0 VID1 PWM1 SOFT-START PGND VID2 AND TTL D/A FAULT LOGIC CONVERTER VID3 (VID DAC) CONTROL LOGIC VID4 EA DACSEL/VID5 BOOT2 + OC PWM2 VRM10 - UGATE2 FB PHASE2 GATE CONTROL CURRENT CORRECTION OFFSET LGATE2 SOURCE GND 2 OFS ISEN