1.

Introduction

The NE57810 is designed to provide power for termination of a Double Data Rate (DDR)

SDRAM memory bus. It significantly reduces parts count, board space, and overall

system cost compared to previous solutions.

2.

General description

The NE57810 DDR termination regulator maintains an output voltage (DDR reference bus

voltage) that is half the RAM supply voltage. It is capable of providing up to

± 3.5 A for

sustained periods. Overcurrent limiting protects the NE57810 from inrush currents at

start-up. Overtemperature shutdown protects the device in extreme temperature

situations.

The package is thermally robust for flexibility of thermal design. The NE57810 is a linear

regulator so no external inductors or switching FETs are necessary. Fast response to load

changes reduces the need for output capacitors.

3.

Features

capacitors)

4.

Applications

NE57810

Advanced DDR memory termination power with external

reference voltage in

Rev. 04 — 24 November 2008

Product data sheet