LP2989AIMM-1.8 National Semiconductor, LP2989AIMM-1.8 Datasheet

LP2989AIMM-1.8

Manufacturer Part Number

LP2989AIMM-1.8

Description

Manufacturer

National Semiconductor

Datasheets

1.LP2989IM-1.8.pdf (11 pages)

2.LP2989AIMM-1.8.pdf (11 pages)

Specifications of LP2989AIMM-1.8

Date_code

04+

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LP2989LV

Micropower 500 mA Low Noise Low Dropout Regulator

for Applications with Output Voltages

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

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

an external 10 nF capacitor to the bypass pin.

Using an optimized VIP

cess, the LP2989LV delivers superior performance:

Ground Pin Current: Typically 3 mA

110 µA

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.

Block Diagram

VIP

™

is a trademark of National Semiconductor Corporation.

100 µA load.

™

(Vertically Integrated PNP) pro-

DS101357

2V.

500 mA load, and

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 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

0.8 µA quiescent current when shutdown

10135701

February 2005

www.national.com

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