Description

The CS5155 is a 5-bit synchronous dual N-Channel buck controller. It is designed to provide unprece dented transient response for todayÕs demanding high-density, high-speed logic. The regulator operates using a proprietary control method, which allows a 100ns response time to load transients. The CS5155 is designed to operate over a 4.25-14V range (VCC) using 12V to power the IC and 5V as the main supply for conversion.

The CS5155 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 CS5155 is backwards compatible with the 4 bit CS-5150, allowing the mother board designer the capabili ty of using either the CS-5150 or the CS5155 with no change in layout. The CS5155 is available in 16 pin surface mount and DIP packages.

Features

■ Dual N-Channel Design

■ Excess of 1MHz Operation

■ 100ns Transient Response

■ 5-Bit DAC

■ Backward Compatible with 4 Bit CS-5150/5151 and Adjustable CS-5120/5121

■ 30ns Gate Rise/Fall Times

■ 1% DAC Accuracy

■ 5V & 12V Operation

■ Remote Sense

■ Programmable Soft Start

■ Lossless Short Circuit Protection

■ VCC Monitor

■ 25ns FET Nonoverlap Time

■ Adaptive Voltage Positioning

■ V2ª Control Topology

■ Current Sharing

■ Overvoltage Protection