LP2957A

更新时间： 2024-09-28 23:47:43

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
14页	381K
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LP2957A 数据手册

June 1998

LP2957/LP2957A

5V Low-Dropout Regulator for µP Applications

General Description

Features

n 5V output within 1.4% over temperature (A grade)

n Easily programmed for snap-on/snap-off output

n Guaranteed 250 mA output current

The LP2957 is a 5V micropower voltage regulator with elec-

tronic shutdown, error flag, very low quiescent current

(150 µA typical at 1 mA load), and very low dropout voltage

(470 mV typical at 250 mA load current).

n Extremely low quiescent current

Output can be wired for snap-on/snap-off operation to elimi-

nate transition voltage states where µP operation may be un-

predictable.

n Low Input-Output voltage required for regulation

n Reverse battery protection

n Extremely tight line and load regulation

n Very low temperature coefficient

n Current and thermal limiting

n Error flag signals when output is out of regulation

Output crowbar (50 mA typical pull-down current) will bring

down the output quickly when the regulator snaps off or

when the shutdown function is activated.

The part has tight line and load regulation (0.04% typical)

and low output temperature coefficient (20 ppm/˚C typical).

Applications

n High-efficiency linear regulator

n Battery-powered regulator

The accuracy of the 5V output is guaranteed at room tem-

perature and over the full operating temperature range.

The LP2957 is available in the five-lead TO-220 and TO-263

packages.

Package Outline

Bent, Staggered Leads

5-Lead TO-220 (T)

DS011340-16

Top View

Order Number LP2957AIT or LP2957IT

See NS Package Number T05D

Plastic Surface Mount Package

5-Lead TO-263 (S)

DS011340-17

Top View

DS011340-18

Side View

Order Number LP2957AIS or LP2957IS

See NS Package Number TS5B

DS011340

www.national.com

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与LP2957A相关器件

型号	品牌	获取价格	描述	数据表
LP2957A_15	TI	获取价格	LP2957/LP2957A 5V Low-Dropout Regulator for Î
LP2957AIS	NSC	获取价格	5V Low-Dropout Regulator for P Applications
LP2957AISX	ETC	获取价格	Positive Fixed Voltage Regulator
LP2957AISX/NOPB	NSC	获取价格	IC VREG 5 V FIXED POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PSSO5, TO-263, 5 PIN, Fixed Posit
LP2957AISX/NOPB	TI	获取价格	5V Low-Dropout Regulator for Î¼P Applications
LP2957AIT	NSC	获取价格	5V Low-Dropout Regulator for P Applications
LP2957AIT	TI	获取价格	5V Low-Dropout Regulator for Î¼P Applications
LP2957AIT/NOPB	NSC	获取价格	IC VREG 5 V FIXED POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PSFM5, BENT STAGGERED, TO-220, 5
LP2957AIT/NOPB	TI	获取价格	5V Low-Dropout Regulator for Î¼P Applications
LP2957IS	NSC	获取价格	5V Low-Dropout Regulator for P Applications