ISL6439, ISL6439A Data Sheet September 15, 2015 FN9057.6 Single Sync Buck PWM Controller for Features Broadband Gateway Applications Operates from 3.3V to 5V Input The ISL6439 makes easy 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 step-down converter. Designed to drive N-Channel - 1.5% Over Load, Line Voltage and Temperature MOSFETs in a synchronous buck topology, the ISL6439 integrates the control, output adjustment, monitoring and Drives N-Channel MOSFETs protection functions into a single package. Simple Single-Loop Control Design The ISL6439 provides simple, single feedback loop, voltage- - Voltage-Mode PWM Control mode control with fast transient response. The output Fast Transient Response voltage can be precisely regulated to as low as 0.8V, with a - High-Bandwidth Error Amplifier maximum tolerance of 1.5% over temperature and line - Full 0% to 100% Duty Cycle 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 Converter can Source and Sink Current product and 6V/ s slew rate which enables high converter Small Converter Size bandwidth for fast transient performance. The resulting - Internal Fixed Frequency Oscillator PWM duty cycles range from 0% to 100%. - ISL6439: 300kHz Protection from overcurrent conditions is provided by - ISL6439A: 600kHz monitoring the r of the upper MOSFET to inhibit PWM DS(ON) Internal Soft-Start operation appropriately. This approach simplifies the 14 Pin SOIC or 16 Lead 5x5 QFN implementation and improves efficiency by eliminating the need for a current sense resistor. QFN Package: - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Lead - Package Outline - Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile Pb-free (RoHS compliant) Applications Cable Modems, Set Top Boxes, and DSL Modems DSP and Core Communications Processor Supplies Memory Supplies Personal Computer Peripherals Industrial Power Supplies 3.3V-Input DC/DC Regulators Low-Voltage Distributed Power Supplies 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 LLC. Copyright Intersil Americas LLC. 2003-2004, 2008, 2015. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.ISL6439, ISL6439A Pinouts ISL6439, ISL6439A ISL6439, ISL6439A (14 LEAD SOIC) (16 LEAD 5x5 QFN) TOP VIEW TOP VIEW GND 1 14 UGATE BOOT LGATE 2 13 16 15 14 13 PHASE CPVOUT 3 12 VCC CT1 4 11 CPVOUT 1 12 PHASE CT2 5 10 CPGND CT1 2 11 VCC ENABLE OCSET 6 9 10 CT2 3 CPGND FB 7 8 COMP OCSET 4 9 NC 576 8 Ordering Information PART NUMBER PACKAGE (See Note) PART MARKING TEMP RANGE (C) (RoHS Compliant) PKG DWG. ISL6439CBZ (No longer 6439CBZ 0 to +70 14 lead SOIC M14.15 available, recommended replacement: ISL6439IBZ) ISL6439IBZ 6439IBZ -40 to +85 14 lead SOIC M14.15 ISL6439AIBZ 6439AIBZ -40 to +85 14 lead SOIC M14.15 ISL6439IRZ (No longer ISL6439 IRZ -40 to +85 16 Lead 5x5 QFN L16.5x5B available or supported) ISL6439AIRZ (No longer ISL6439 AIRZ -40 to +85 16 Lead 5x5 QFN L16.5x5B available or supported) ISL6439EVAL1 ISL6439 SOIC Evaluation Board *Add -T suffix to part number for tape and reel packaging. 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. FN9057.6 2 September 15, 2015 NO LONGER AVAILABLE OR SUPPORTED NC LGATE FB GND COMP UGATE BOOT ENABLE