Datasheet > LP2997

LP2997

更新时间： 2023-09-03 20:27:39

品牌	Logo	应用领域
德州仪器 - TI		双倍数据速率稳压器
页数	文件大小	规格书
25页	1155K
描述
DDR-II 终止稳压器

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数据手册
替代型号

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LP2997 数据手册

LP2997

www.ti.com

SNVS295F –MAY 2004–REVISED APRIL 2013

LP2997 DDR-II Termination Regulator

Check for Samples: LP2997

FEATURES

DESCRIPTION

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 continuous 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.

•

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 SOIC-8, SO PowerPAD-8 Packages

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

APPLICATIONS

•

DDR-II Termination Voltage

SSTL-18 Termination

the V_TToutput will tri-state providing

high

impedance output, but, V_REFwill remain active. A

power savings advantage can be obtained in this

mode through lower quiescent current.

Typical Application Circuit

LP2997

0.9V

V_REF

C_REF

AV_IN= 2.5V

V _SENSE

V_TT

V_DDQ

V_DDQ= 1.8V

V _TT= 0.9V

GND

C_IN

C _OUT

Figure 1. Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...25

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LP2997 替代型号

型号	品牌	替代类型	描述	数据表
LP2996-N	TI	功能相似	LP2996-N DDR Termination Regulator

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