LP2989IM-2.5 National Semiconductor, LP2989IM-2.5 Datasheet

LP2989IM-2.5

Manufacturer Part Number

LP2989IM-2.5

Description

IC,VOLT REGULATOR,FIXED,+2.5V,BIPOLAR,SOP,8PIN,PLASTIC

Manufacturer

National Semiconductor

Datasheets

1.LP2989IM-2.5.pdf (17 pages)

2.LP2989IM-2.5.pdf (19 pages)

3.LP2989IM-2.5.pdf (12 pages)

Specifications of LP2989IM-2.5

Rohs Compliant

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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 regu-

lator designed for use with ceramic output capacitors.

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 LP2989 delivers superior performance:

Dropout Voltage: Typically 310 mV

Ground Pin Current: Typically 3 mA

110 µA

Sleep Mode: The LP2989 draws less than 0.8 µA 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% (“A” grade) and 1.25% (standard grade) at room

temperature.

For output voltages

Block Diagram

VIP

™

is a trademark of National Semiconductor Corporation.

100 µA load.

2V, see LP2989LV datasheet.

™

(Vertically Integrated PNP) pro-

500 mA load, and 1

DS101339

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

10133901

February 2005

www.national.com

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