Datasheet > LP2989AIMX-3.3

LP2989AIMX-3.3

更新时间： 2024-11-26 20:33:55

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LP2989AIMX-3.3 数据手册

February 2005

LP2989

Micropower/Low Noise, 500 mA Ultra Low-Dropout

Regulator

For Use with Ceramic Output Capacitors

General Description

Features

n Ultra low dropout voltage

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

lator designed for use with ceramic output capacitors.

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

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

an external 10 nF capacitor to the bypass pin.

0.8 µA quiescent current when shutdown

™

Using an optimized VIP (Vertically Integrated PNP) pro-

cess, the LP2989 delivers superior performance:

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

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.

Applications

Error Flag: The built-in error flag goes low when the output

drops approximately 5% below nominal.

n Notebook/Desktop PC

n PDA/Palmtop Computer

n Wireless Communication Terminals

n SMPS Post-Regulator

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.

Block Diagram

10133901

™

VIP is a trademark of National Semiconductor Corporation.

DS101339

www.national.com

12 3 4 5 6 7...17

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与LP2989AIMX-3.3相关器件

型号	品牌	获取价格	描述	数据表
LP2989AIMX-3.3/NOPB	TI	获取价格	具有电源正常指示和使能功能的 500mA、16V、低压降稳压器 \| D \| 8 \| -40
LP2989AIMX-5.0/NOPB	TI	获取价格	具有电源正常指示和使能功能的 500mA、16V、低压降稳压器 \| D \| 8 \| -40
LP2989ILD-1.8	NSC	获取价格	Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages <
LP2989ILD-1.8/NOPB	TI	获取价格	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output C
LP2989ILD-2.5	NSC	获取价格	Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capac
LP2989ILD-2.5	ROCHESTER	获取价格	2.5V FIXED POSITIVE LDO REGULATOR, 0.65V DROPOUT, PDSO8, LLP-8
LP2989ILD-2.5	TI	获取价格	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator
LP2989ILD-2.5/NOPB	ROCHESTER	获取价格	2.5V FIXED POSITIVE LDO REGULATOR, 0.65V DROPOUT, PDSO8, LLP-8
LP2989ILD-2.5/NOPB	TI	获取价格	Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator
LP2989ILD-2.8	NSC	获取价格	Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capac

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