LP2989IM-3.3 Datasheet

IC型號(hào)：
LP2989IM-3.3
PDF描述：
Positive Fixed Voltage Regulator
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518.36KB
PDF頁(yè)數(shù)：
14頁(yè)
芯片廠家：
ETC

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LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator

For Use with Ceramic Output Capacitors

July 2000

LP2989

Micropower/Low Noise, 500 mA Ultra Low-Dropout

Regulator

For Use with Ceramic Output Capacitors

General Description

The LP2989 is a fixed-output 500 mA precision LDO regula-

tor designed for use with ceramic output capacitors.

Output noise can be reduced to 18碌V (typical) by connecting

an external 10 nF capacitor to the bypass pin.

Using an optimized VIP

鈩?/div>

(Vertically Integrated PNP) pro-

cess, the LP2989 delivers superior performance:

Dropout Voltage:

Typically 310 mV

500 mA load, and 1

100 碌A(chǔ) load.

Ground Pin Current:

Typically 3 mA

500 mA load, and

110 碌A(chǔ)

100 碌A(chǔ) load.

Sleep Mode:

The LP2989 draws less than 0.8 碌A(chǔ) quiescent

current when shutdown pin is pulled low.

Error Flag:

The built-in error flag goes low when the output

drops approximately 5% below nominal.

Precision Output:

Guaranteed output voltage accuracy is

0.75% (鈥淎鈥?grade) and 1.25% (standard grade) at room tem-

perature.

Features

Ultra low dropout voltage

Guaranteed 500 mA continuous output current

Very low output noise with external capacitor

SO-8 surface mount package

0.8 碌A(chǔ) quiescent current when shutdown

Low ground pin current at all loads

0.75% output voltage accuracy (鈥淎鈥?grade)

High peak current capability (800 mA typical)

Wide supply voltage range (16V max)

Overtemperature/overcurrent protection

鈭?0藲C to +125藲C junction temperature range

Applications

Notebook/Desktop PC

PDA/Palmtop Computer

Wireless Communication Terminals

SMPS Post-Regulator

Block Diagram

DS101339-1

VIP

鈩?/div>

is a trademark of National Semiconductor Corporation.

漏 2000 National Semiconductor Corporation

DS101339

www.national.com

制造商
National Semiconductor (TI)
最大輸入電壓
16 V
輸出電壓
3.3 V
回動(dòng)電壓（最大值）
0.003 V at 0.1 mA, 0.2 V at 200 mA, 0.425 V at 500 mA
輸出電流
0.5 A
負(fù)載調(diào)節(jié)
0.4 %
輸出端數(shù)量
1
輸出類型
Fixed
最大工作溫度
+ 125 C
安裝風(fēng)格
SMD/SMT
封裝 / 箱體
SOIC-8 Narrow
線路調(diào)整率
0.014 % / V
最小工作溫度
- 40 C
封裝
Tube
工廠包裝數(shù)量
95
電壓調(diào)節(jié)準(zhǔn)確度
+/- 1.25 %

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LP2989IM-3.3 Datasheet

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