LP2989LV datasheet(1/11 Pages) NSC

Part #	LP2989LV

Description	Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages < 2V Designed for Use with Very Low ESR Output Capacitors

PDF	11 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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LP2989LV

Micropower 500 mA Low Noise Low Dropout Regulator

for Applications with Output Voltages < 2V

Designed for Use with Very Low ESR Output Capacitors

General Description

The LP2989LV is a 500 mA fixed-output voltage regulator

designed to provide high performance and low noise in

applications requiring output voltages < 2V.

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

an external 10 nF capacitor to the bypass pin.

Using an optimized VIP™ (Vertically Integrated PNP) pro-

cess, the LP2989LV delivers superior performance:

Ground Pin Current: Typically 3 mA @ 500 mA load, and

110 µA @ 100 µA load.

Sleep Mode: The LP2989LV draws less than 0.8 µA quies-

cent 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% (“A” grade) and 1.25% (standard grade) at room

temperature.

For output voltages

≥ 2V, see LP2989 datasheet.

Features

n

Ultra low dropout voltage

n

Guaranteed 500 mA continuous output current

n

Very low output noise with external capacitor

n

SO-8, Mini SO-8, 8 Lead LLP surface mount packages

n <

0.8 µA quiescent current when shutdown

n

Low ground pin current at all loads

n

0.75% output voltage accuracy (“A” grade)

n

High peak current capability (800 mA typical)

n

Wide supply voltage range (16V max)

n

Overtemperature/overcurrent protection

n

−40˚C to +125˚C junction temperature range

Applications

n

Notebook/Desktop PC

n

PDA/Palmtop Computer

n

Wireless Communication Terminals

n

SMPS Post-Regulator

Block Diagram

10135701

VIP™ is a trademark of National Semiconductor Corporation.

February 2005

DS101357

www.national.com

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LP2989LV Datasheet(PDF) 1 Page - National Semiconductor (TI)

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