ISL6520A Data Sheet December 10, 2009 FN9016.6 Single Synchronous Buck Pulse-Width Features Modulation (PWM) Controller Operates from +5V Input The ISL6520A makes simple work out of implementing a 0.8V to V Output Range IN complete control and protection scheme for a DC/DC - 0.8V Internal Reference stepdown converter. Designed to drive N-Channel - 1.5% Over Line Voltage and Temperature MOSFETs in a synchronous buck topology, the ISL6520A integrates the control, output adjustment, monitoring and Drives N-Channel MOSFETs protection functions into a single 8 Lead package. Simple Single-Loop Control Design The ISL6520A provides simple, single feedback loop, - Voltage-Mode PWM Control voltage-mode control with fast transient response. The Fast Transient Response output voltage can be precisely regulated to as low as 0.8V, - High-Bandwidth Error Amplifier with a maximum tolerance of 1.5% over-temperature and - Full 0% to 100% Duty Cycle line voltage variations. A fixed frequency oscillator reduces design complexity, while balancing typical application cost Lossless, Programmable Overcurrent Protection and efficiency. - Uses Upper MOSFETs r DS(ON) The error amplifier features a 15MHz gain-bandwidth Small Converter Size product and 8V/ms slew rate which enables high converter - 300kHz Fixed Frequency Oscillator bandwidth for fast transient performance. The resulting - Internal Soft-Start PWM duty cycles range from 0% to 100%. - 8 Ld SOIC or 16 Ld 4mmx4mm QFN Protection from overcurrent conditions is provided by QFN Package: monitoring the r of the upper MOSFET to inhibit PWM DS(ON) - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat operation appropriately. This approach simplifies the No Leads - Package Outline implementation and improves efficiency by eliminating the - Near Chip Scale Package footprint, which improves need for a current sense resistor. PCB efficiency and has a thinner profile Pinouts Pb-Free (RoHS Compliant) ISL6520A (8 LD SOIC) Applications TOP VIEW Power Supplies for Microprocessors 1 8 PHASE BOOT -PCs COMP/SD UGATE 2 7 - Embedded Controllers GND 3 6 FB Subsystem Power Supplies LGATE 4 5 VCC - PCI/AGP/GTL+ Buses - ACPI Power Control ISL6520A - SSTL-2 and DDR SDRAM Bus Termination Supply (16 LD QFN) TOP VIEW Cable Modems, Set Top Boxes, and DSL Modems DSP and Core Communications Processor Supplies Memory Supplies 16 15 14 13 Personal Computer Peripherals BOOT 1 12 NC Industrial Power Supplies UGATE 2 11 COMP/OCSET 5V-Input DC/DC Regulators GND 3 10 NC Low-Voltage Distributed Power Supplies NC 4 9 FB 576 88 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. 2004, 2006, 2007, 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. LGATE NC NC NC VCC PHASE NC NCISL6520A Ordering Information PART NUMBER PART TEMP. RANGE PACKAGE PKG. (Note) MARKING (C) (Pb-free) DWG. ISL6520ACBZ* 6520 ACBZ 0 to +70 8 Ld SOIC M8.15 ISL6520ACBZA* 6520 ACBZ 0 to +70 8 Ld SOIC M8.15 ISL6520AIBZ* 6520 AIBZ -40 to +85 8 Ld SOIC M8.15 ISL6520ACRZ* 65 20ACRZ 0 to +70 16 Ld 4x4mm QFN L16.4x4 ISL6520AIRZ* 65 20AIRZ -40 to +85 16 Ld 4x4mm QFN L16.4x4 ISL6520EVAL1 Evaluation Board *Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: 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. FN9016.6 2 December 10, 2009