CS5157

CS5157 CS5157 CPU 5-Bit Synchronous Buck Controller 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 Compatible 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 AlEl 0.1µF VCC1 VCC2 VID0 VID1 VID2 VID3 VID4 330pF SS 0.1µF 0.33µF COMP LGnd VID0 VID1 VID2 VID3 VID4 COFF PGnd VFB VFFB 3.3k VGATE(H) IRL3103 2µH 1.3V to 3.5V @ 13A Package Options CS...