LP2997

更新时间： 2024-09-12 22:55:47

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器双倍数据速率
页数	文件大小	规格书
12页	232K
描述
DDR-II Termination Regulator

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数据手册

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LP2997 数据手册

June 2004

LP2997

DDR-II Termination Regulator

General Description

Features

n Source and sink current

n Low output voltage offset

n No external resistors required

n Linear topology

The LP2997 linear regulator is designed to meet the JEDEC

SSTL-18 specifications for termination of DDR-II memory.

The device contains a high-speed operational amplifier to

provide excellent response to load transients. The output

stage prevents shoot through while delivering 500mA con-

tinuous current and transient peaks up to 900mA in the

application as required for DDR-II SDRAM termination. The

LP2997 also incorporates a V_SENSEpin to provide superior

load regulation and a V_REFoutput as a reference for the

chipset and DIMMs.

n Suspend to Ram (STR) functionality

n Low external component count

n Thermal Shutdown

n Available in SO-8, PSOP-8 packages

Applications

An additional feature found on the LP2997 is an active low

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

functionality. When SD is pulled low the V_TToutput will

tri-state providing a high impedance output, but, V_REFwill

remain active. A power savings advantage can be obtained

in this mode through lower quiescent current.

n DDR-II Termination Voltage

n SSTL-18 Termination

Typical Application Circuit

20109418

DS201094

www.national.com

12 3 4 5 6 7...12

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与LP2997相关器件

型号	品牌	获取价格	描述	数据表
LP2997M	TI	获取价格	DDR-II 终止稳压器 \| D \| 8 \| 0 to 125
LP2997M	NSC	获取价格	DDR-II Termination Regulator
LP2997M/NOPB	NSC	获取价格	IC BUS TERMINATOR SUPPORT CIRCUIT, PDSO8, ROHS COMPLIANT, SOP-8, Bus Terminator
LP2997M/NOPB	TI	获取价格	DDR-II 终止稳压器 \| D \| 8 \| 0 to 125
LP2997MR	NSC	获取价格	DDR-II Termination Regulator
LP2997MR	TI	获取价格	DDR-II 终止稳压器 \| DDA \| 8 \| 0 to 125
LP2997MR/NOPB	NSC	获取价格	IC BUS TERMINATOR SUPPORT CIRCUIT, PDSO8, PSOP-8, Bus Terminator
LP2997MR/NOPB	TI	获取价格	DDR-II 终止稳压器 \| DDA \| 8 \| 0 to 125
LP2997MRX	NSC	获取价格	DDR-II Termination Regulator
LP2997MRX/NOPB	NSC	获取价格	IC BUS TERMINATOR SUPPORT CIRCUIT, PDSO8, PSOP-8, Bus Terminator