Datasheet > LP2978

LP2978

更新时间： 2024-02-21 05:56:47

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
7页	106K
描述
Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout Regulator

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LP2978 数据手册

July 2000

LP2978

Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout

Regulator

Designed for Use with Very Low ESR Output Capacitors

General Description

The LP2978 is a 50 mA, fixed-output voltage regulator de-

signed to provide ultra low-dropout and low noise in battery

powered applications.

Features

n Ultra low dropout voltage

n Smallest possible size (SOT-23 Package)

n Requires minimum external components

n Stable with low-ESR output capacitor

™

Using an optimized VIP (Vertically Integrated PNP) pro-

cess, the LP2978 delivers unequalled performance in all

specifications critical to battery-powered designs:

1 µA quiescent current when shut down

n Low ground pin current at all loads

n Output voltage accuracy 1% (A Grade)

n High peak current capability

Dropout Voltage: Typically 120 mV 50 mA load, and 7 mV

1 mA load.

Ground Pin Current: Typically 350 µA 50 mA load, and

n Wide supply voltage range (16V max)

n Low Z_OUT: 0.3Ω typical (10 Hz to 1 MHz)

n Overtemperature/overcurrent protection

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

n Custom voltages available

75 µA 1 mA load.

Enhanced Stability: The LP2978 is stable with output ca-

pacitor ESR as low as 5 mΩ, which allows the use of ceramic

capacitors on the output.

Sleep Mode: Less than 1 µA quiescent current when

ON/OFF pin is pulled low.

Applications

Smallest Possible Size: SOT-23 package uses absolute

minimum board space.

n Cellular Phone

n Palmtop/Laptop Computer

n Personal Digital Assistant (PDA)

n Camcorder, Personal Stereo, Camera

Precision Output: 1% tolerance output voltages available

(A grade).

Low Noise: By adding a 10 nF bypass capacitor, output

noise can be reduced to 30 µV (typical).

Block Diagram

DS100935-1

™

VIP is a trademark of National Semiconductor Corporation.

DS100935

www.national.com

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