LP2998MA+ National Semiconductor, LP2998MA+ Datasheet

LP2998MA+

Manufacturer Part Number

LP2998MA+

Description

Manufacturer

National Semiconductor

Datasheets

1.LP2998MA.pdf (18 pages)

2.LP2998MAX.pdf (18 pages)

Specifications of LP2998MA+

Notes

NEW

Date_code

10+

Current page: 1 of 18
Download datasheet (347Kb)

LP2998

DDR-II and DDR-I Termination Regulator

General Description

The LP2998 linear regulator is designed to meet JEDEC

SSTL-2 and JEDEC SSTL-18 specifications for termination of

DDR-SDRAM and DDR-II memory. The device contains a

high-speed operational amplifier to provide excellent re-

sponse to load transients. The output stage prevents shoot

through while delivering 1.5A continuous current as required

for DDR-SDRAM termination. The LP2998 also incorporates

a V

output as a reference for the chipset and DIMMs.

An additional feature found on the LP2998 is an active low

shutdown (SD) pin that provides Suspend To RAM (STR)

functionality. When SD is pulled low, the V

state providing a high impedance output, while V

active. A power savings advantage can be obtained in this

mode through lower quiescent current.

Typical Application Circuit

SENSE

pin to provide superior load regulation and a V

300269

output will tri-

REF

remains

REF

Features

■

Applications

■

Source and sink current

Low output voltage offset

No external resistors required

Linear topology

Suspend to Ram (STR) functionality

Low external component count

Thermal Shutdown

Available in SO-8, PSOP-8 packages

DDR-I and DDR-II Termination Voltage

SSTL-18 Termination

SSTL-2 and SSTL-3 Termination

HSTL Termination

30026918

December 1, 2008

www.national.com

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