The CS5151 is a 4-bit nonsyn-

chronous N-Channel buck con-

troller. It is designed to provide

unprecedented transient response

for today’s demanding high-densi-

ty, high-speed logic. The regulator

operates using a proprietary control

method, which allows a 100ns

response time to load transients.

The CS5151 is designed to operate

12V to power the IC and 5V as the

main supply for conversion.

The CS5151 is specifically designed

MMX™ Technology and other high

performance core logic. It includes

the following features: on board,

4-bit DAC, short circuit protection,

and programmable soft start capa-

bility. The CS5151 is upwards com-

patible with the 5-bit CS5156, allow-

ing the mother board designer the

capability of using either the

CS5151 or the CS5156 with no

change in layout. The CS5151 is

available in 16 pin surface mount

and DIP packages.

Features

s

N-Channel Design

s

Excess of 1MHz Operation

s

100ns Transient Response

s

4-Bit DAC

s

Upward Compatible with

5-Bit CS5155/5156 and

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

s

s

Adaptive Voltage

Positioning

s

s

Current Sharing

s

Overvoltage Protection

Package Options

CPU 4-Bit Nonsynchronous Buck Controller

CS5151

Description

Application Diagram

1

SS

NC

COMP

LGnd

NC

PGnd

16 Lead SO Narrow & PDIP

1

0.33µF

SS

LGnd

COMP

IRL3103

0.1µF

12V

5V

2µH

2.1V to 3.5V @ 13A

PGnd

1200µF/16V x 3

AlEl

3.3k

0.1µF

1200µF/16V x 5

AlEl

100pF

330pF

CS5151

MBR735

3

1,2

Pentium is a registered trademark and MMX is a 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.com

Web Site: www.cherry-semi.com

A

Company

®

Rev. 1/5/99