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參數(shù)資料
| 型號(hào)： | LP2997MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | DDR-II Termination Regulator |
| 中文描述： | BUS TERMINATOR SUPPORT CIRCUIT, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 233K |
| 代理商： | LP2997MX |
LP2997
DDR-II Termination Regulator
General 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 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
SENSE
pin to provide superior
load regulation and a V
REF
output as a reference for the
chipset and DIMMs.
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
TT
output will
tri-state providing a high impedance output, but, V
REF
will
remain active. A power savings advantage can be obtained
in this mode through lower quiescent current.
Features
n
Source and sink current
n
Low output voltage offset
n
No external resistors required
n
Linear topology
n
Suspend to Ram (STR) functionality
n
Low external component count
n
Thermal Shutdown
n
Available in SO-8, PSOP-8 packages
Applications
n
DDR-II Termination Voltage
n
SSTL-18 Termination
Typical Application Circuit
20109418
June 2004
L
2004 National Semiconductor Corporation
DS201094
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2997MX/NOPB | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LP2998EVAL | 功能描述:電源管理IC開(kāi)發(fā)工具 LP2998 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP2998EVAL | 制造商:Texas Instruments 功能描述:EVAL BOARD, LP2988 DDR TERMINATION REGUL |
| LP2998MA | 制造商:Texas Instruments 功能描述:Termination Regulator 8-Pin SOIC N Rail 制造商:Texas Instruments 功能描述:IC, DDRI/II TERMINATION REG |
| LP2998MA/NOPB | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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