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ISL65426 Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL65426 Datasheet(HTML) 1 Page - Intersil Corporation |
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1 ® ISL65426 6A Dual Synchronous Buck Regulator with Integrated MOSFETs The ISL65426 is a high efficiency dual output monolithic synchronous buck converter operating over an input voltage range of 2.375V to 5.5V. This single chip power solution provides two output voltages which are selectable or externally adjustable from 1V to 80% of the supply voltage while delivering up to 6A of total output current. The two PWMs are synchronized 180° out of phase reducing the RMS input current and ripple voltage. The ISL65426 switches at a fixed frequency of 1MHz and utilizes current-mode control with integrated compensation to minimize the size and number of external components and provide excellent transient response. The internal synchronous power switches are optimized for good thermal performance, high efficiency, and eliminate the need for an external Schottky diode. A unique power block architecture allows partitioning of six 1A capable blocks to support one of four configuration options. One master power block is associated with each synchronous converter channel. Four floating slave power blocks allow the user to assign them to either channel. Proper external configuration of the power blocks is verified internally prior to soft-start initialization. Independent enable inputs allow for synchronization or sequencing soft-start intervals of the two converter channels. A third enable input allows additional sequencing for multi-input bias supply designs. Individual power good indicators (PG1, PG2) signal when output voltage is within regulation window. The ISL65426 integrates protection for both synchronous buck regulator channels. The fault conditions include overcurrent, undervoltage, and IC thermal monitor. High integration contained in a thin Quad Flat No-lead (QFN) package makes the ISL65426 an ideal choice to power many of today’s small form factor applications. A single chip solution for large scale digital ICs, like field programmable gate arrays (FPGA), requiring separate core and I/O voltages. Features • High Efficiency: Up to 95% • Fixed Frequency: 1MHz • Operates From 2.375V to 5.5V Supply • ±1% Reference • Flexible Output Voltage Options - Programmable 2-Bit VID Input - Adjustable Output From 0.6V to 4.0V • User-Partitioned Power Blocks • Ultra-Compact DC/DC Converter Design • PWMs Synchronized 180° Out of Phase • Independent Enable Inputs and System Enable • Stable All Ceramic Solutions • Excellent Dynamic Response • Independent Output Digital Soft-Start • Power Good Output Voltage Monitor • Short-Circuit and Thermal-Overload Protection • Overcurrent and Undervoltage Protection • Pb-Free Plus Anneal Available (RoHS Compliant) Applications • FPGA, CPLD, DSP, and CPU Core and I/O Voltages - Xilinx Spartan IIITM, Virtex IITM, Virtex II ProTM, Virtex 4TM - Altera StratixTM, Stratix IITM, CycloneTM, Cyclone IITM - Actel FusionTM, LatticeSCTM, LatticeECTM • Low-Voltage, High-Density Distributed Power Systems • Point-of-Load Regulation • Distributed Power Systems • Set-Top Boxes Ordering Information PART NUMBER (Note) PART MARKING TEMP. RANGE (°C) PACKAGE (Pb-free) PKG. DWG. # ISL65426HRZ* ISL65426 HRZ -10 to +100 50 Ld 5x10 QFN L50.5x10 ISL65426IRZA* ISL65426 IRZ -40 to +85 50 Ld 5x10 QFN L50.5x10 *Add “-T” suffix for tape and reel. 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. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 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. FN6340.2 Data Sheet February 21, 2007 |
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