CS5157 Datasheet | Cherry Semiconductor Corporation

Description The CS5157 is a 5-bit synchronous dual N-Channel buck controller. It is designed to provide unprecedented transient response for today’s demanding high-density, high-speed logic. The regulator operates using a proprietary control method, which allows a 100ns response time to load transients. The CS5157 is designed to operate over a 4.25-16V range (VCC) using 12V to power the IC and 5V as the main supply for conversion. The CS5157 is specifically designed to power Pentium® II processors and other high performance core logic. It includes the following features : on board, 5-bit DAC, short circuit protection, 1.0% output tolerance, VCC monitor, and programmable soft start capability. The CS5157 is available in 16 pin surface mount. Features s Dual N-Channel Design s Excess of 1MHz Operation s 100ns Transient Response s 5-Bit DAC s Backward patible with Adjustable CS5120/5121 s 30ns Gate Rise/Fall Times s 1% DAC Accuracy s 5V & 12V Operation s Remote Sense s Programmable Soft Start s Lossless Short Circuit Protection Application Diagram Switching Power Supply for core logic - Pentium® II processor 12V 5V s VCC Monitor s 25ns FET Nonoverlap Time s V2TM Control Topology s Current Sharing s Overvoltage Protection 1200µF/10V x 3 Al El 0.1µF VCC1 VCC2 VID0 VID1 VID2 VID3 VID4 330p F SS 0.1µF 0.33µF P LGnd VID0 VID1 VID2 VID3 VID4 COFF PGnd VFB VFFB 3.3k VGATE(H) IRL3103 2µH 1.3V to 3.5V @ 13A Package Options VGATE(L) IRL3103 1200µF/10V x 5 Al El 16 Lead SO Narrow VID0 VID1 VID2 VID3 SS VID4 COFF VFFB VFB P LGnd VCC1 VGATE(L) PGnd VGATE(H) VCC2 100p F V2 is a trademark of Switch Power, Inc. Pentium is a registered trademark of Intel Corporation. Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi. Web Site: .cherry-semi. Rev. 12/31/98 ® pany Absolute Maximum Ratings Pin Name Max Operating Voltage Max Current VCC1 - - . . . ....