LP2989 datasheet(1/19 Pages) NSC

部件名	LP2989

功能描述	Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors

PDF	19 Pages

Scroll/Zoom	100%

制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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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™ (Vertically Integrated PNP) pro-

cess, the LP2989 delivers superior performance:

Dropout Voltage: Typically 310 mV @ 500 mA load, and 1

mV @ 100 µA load.

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

110 µA @ 100 µA load.

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 < 2V, see LP2989LV 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

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Notebook/Desktop PC

n

PDA/Palmtop Computer

n

Wireless Communication Terminals

n

SMPS Post-Regulator

Block Diagram

10133901

VIP™ is a trademark of National Semiconductor Corporation.

June 2002

DS101339

www.national.com

类似零件编号 - LP2989

制造商	部件名	数据表	功能描述
Texas Instruments	LP2989	997Kb / 19P	LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout RegulatorFor Use with Ceramic Output Capacitors
	LP2989	997Kb / 19P	LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout RegulatorFor Use with Ceramic Output Capacitors
	LP2989	1Mb / 34P	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator
National Semiconductor ...	LP2989AILD-1.8	685Kb / 11P	Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages < 2V Designed for Use with Very Low ESR Output Capacitors
Texas Instruments	LP2989AILD-1.8/NOPB	1Mb / 26P	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors

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类似说明 - LP2989

制造商	部件名	数据表	功能描述
National Semiconductor ...	LP2985	478Kb / 21P	Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors
	LP2989LV	685Kb / 11P	Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages < 2V Designed for Use with Very Low ESR Output Capacitors
	LP2978	286Kb / 8P	Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors
Texas Instruments	LP2989AIM-33	1Mb / 19P	Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator
	LP2989AILD-5.0	997Kb / 19P	LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout RegulatorFor Use with Ceramic Output Capacitors
	LP2989AIM-5.0	997Kb / 19P	LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout RegulatorFor Use with Ceramic Output Capacitors
	LP2989	1Mb / 34P	LP2989 Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors
	LP2989LV	1Mb / 26P	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors
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