ISL6526, ISL6526A Data Sheet November 24, 2008 FN9055.10 Single Synchronous Buck Pulse-Width Features Modulation (PWM) Controller Operates from 3.3V to 5V Input The ISL6526, ISL6526A make simple work out of 0.8V to V Output Range IN implementing a complete control and protection scheme for - 0.8V Internal Reference a DC/DC stepdown converter. Designed to drive N-Channel - 1.5% Over Load, Line Voltage and Temperature MOSFETs in a synchronous buck topology, the ISL6526, ISL6526A integrate the control, output adjustment, Drives N-Channel MOSFETs monitoring and protection functions into a single package. Simple Single-Loop Control Design The ISL6526, ISL6526A provide simple, single feedback - Voltage-Mode PWM Control loop, 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 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%. - ISL6526: 300kHz Protection from overcurrent conditions is provided by - ISL6526A: 600kHz monitoring the r of the upper MOSFET to inhibit PWM DS(ON) Internal Soft-Start operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the 14 Ld SOIC or 16 Ld 5x5 QFN need for a current sense resistor. QFN Package: - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline - Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile Pb-Free (RoHS Compliant) Applications Power Supplies for Microprocessors -PCs - Embedded Controllers Subsystem Power Supplies - PCI/AGP/GTL+ Buses - ACPI Power Control - DDR SDRAM Bus Termination Supply 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 Inc. Copyright Intersil Americas Inc. 2001-2005, 2007, 2008. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.ISL6526, ISL6526A Ordering Information PART NUMBER PART TEMP PKG (Note) MARKING RANGE (C) PACKAGE DWG. ISL6526CBZ 6526CBZ 0 to +70 14 Ld SOIC (Pb-free) M14.15 ISL6526CBZ-T* 6526CBZ 0 to +70 14 Ld SOIC (Pb-free) M14.15 ISL6526ACBZ 6526ACBZ 0 to +70 14 Ld SOIC (Pb-free) M14.15 ISL6526ACBZ-T* 6526ACBZ 0 to +70 14 Ld SOIC (Pb-free) M14.15 ISL6526CRZ ISL6526 CRZ 0 to +70 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526CRZ-T* ISL6526 CRZ 0 to +70 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526ACRZ ISL6526 ACRZ 0 to +70 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526ACRZ-T* ISL6526 ACRZ 0 to +70 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526IBZ 6526IBZ -40 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6526IBZ-T* 6526IBZ -40 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6526AIBZ 6526AIBZ -40 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6526AIBZ -T* 6526AIBZ -40 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6526IRZ ISL 6526IRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526IRZ-T* ISL 6526IRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526IRZ-TK* ISL 6526IRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526AIRZ ISL65 26AIRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526AIRZ-T* ISL65 26AIRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526AIRZ-TK* ISL65 26AIRZ -40 to +85 16 Ld 5x5 QFN (Pb-free) L16.5x5B ISL6526EVAL1 ISL6526 SOIC Evaluation Board ISL6526EVAL2 ISL6526 QFN Evaluation Board ISL6526AEVAL1 ISL6526A SOIC Evaluation Board ISL6526AEVAL2 ISL6526A QFN Evaluation Board *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. Pinouts ISL6526, ISL6526A ISL6526, ISL6526A (14 LD SOIC) (16 LD QFN) TOP VIEW TOP VIEW GND 1 14 UGATE BOOT LGATE 2 13 16 15 14 13 CPVOUT 3 12 PHASE CPVOUT 1 12 PHASE CT1 4 11 VCC CPGND CT2 5 10 CT1 2 11 VCC OCSET 6 9 ENABLE CT2 3 10 CPGND FB 7 8 COMP OCSET 4 9 NC 576 8 FN9055.10 2 November 24, 2008 NC LGATE FB GND COMP UGATE BOOT ENABLE