Datasheet > LM3940J

LM3940J

更新时间： 2024-11-22 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
11页	294K
描述
1A Low Dropout Regulator for 5V to 3.3V Conversion

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LM3940J 数据手册

May 1999

LM3940

1A Low Dropout Regulator for 5V to 3.3V Conversion

General Description

The LM3940 is a 1A low dropout regulator designed to pro-

vide 3.3V from a 5V supply.

Features

n Output voltage specified over temperature

n Excellent load regulation

n Guaranteed 1A output current

n Requires only one external component

n Built-in protection against excess temperature

n Short circuit protected

The LM3940 is ideally suited for systems which contain both

5V and 3.3V logic, with prime power provided from a 5V bus.

Because the LM3940 is a true low dropout regulator, it can

hold its 3.3V output in regulation with input voltages as low

as 4.5V.

The T0-220 package of the LM3940 means that in most ap-

plications the full 1A of load current can be delivered without

using an additional heatsink.

Applications

n Laptop/Desktop Computers

n Logic Systems

The surface mount TO-263 package uses minimum board

space, and gives excellent power dissipation capability when

soldered to a copper plane on the PC board.

Typical Application

DS012080-1

Required if regulator is located more than 1" from the power supply filter capacitor or if battery power is used.

See Application Hints.

DS012080

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型号	品牌	获取价格	描述	数据表
LM3940J-3.3-MPR	TI	获取价格	3.3V FIXED POSITIVE LDO REGULATOR, 1V DROPOUT, CDIP16, CERAMIC, DIP-16
LM3940J-3.3-QML	NSC	获取价格	1A Low Dropout Regulator for 5V to 3.3V Conversion
LM3940J-3.3-SCD	ROCHESTER	获取价格	3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, CDIP16, CERAMIC, DIP-16
LM3940LDX-3.3/NOPB	NSC	获取价格	IC,VOLT REGULATOR,FIXED,+3.3V,BIPOLAR,LLCC,8PIN,PLASTIC
LM3940N	ETC	获取价格	1.25A High Current Low Dropout
LM3940S	ETC	获取价格	1.25A High Current Low Dropout
LM3940T	ETC	获取价格	1.25A High Current Low Dropout
LM3940WG-3.3-QML	NSC	获取价格	1A Low Dropout Regulator for 5V to 3.3V Conversion
LM3940WG3.3-SCD	NSC	获取价格	3.3V FIXED POSITIVE LDO REGULATOR, 1V DROPOUT, CDSO16, CERAMIC, SOIC-16
LM394BH	NSC	获取价格	LM194/LM394 Supermatch Pair