Datasheet > LM3940IT-3.3/NOPB

LM3940IT-3.3/NOPB

更新时间： 2024-11-23 12:02:11

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
18页	1864K
描述
LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion

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LM3940

www.ti.com

SNVS114E –MAY 1999–REVISED MARCH 2013

LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion

Check for Samples: LM3940

FEATURES

APPLICATIONS

•

Output voltage specified over temperature

Excellent load regulation

•

Laptop/Desktop Computers

Logic Systems

Specified 1A output current

Requires only one external component

Built-in protection against excess temperature

Short circuit protected

DESCRIPTION

The LM3940 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply.

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 TO-220 package of the LM3940 means that in most applications the full 1A of load current can be delivered

without using an additional heatsink.

The surface mount DDPAK/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

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

**See APPLICATION HINTS.

CONNECTION DIAGRAM

Figure 1. 3-Lead TO-220 Package

(Front View)

Figure 2. 3-Lead DDPAK/TO-263 Package

(Front View)

Drawing Number NDE00EB

Drawing Number KTT003B

Figure 3. 3-Lead SOT-223

(Front View)

Drawing Number DCY (R-PDSO-G4)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...18

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LM3940IT-3.3/NOPB 替代型号

型号	品牌	替代类型	描述	数据表
LMS1585AIS-3.3/NOPB	TI	类似代替	5A、13V 线性稳压器 \| KTT \| 3 \| -40 to 125
LM3940IT-3.3	TI	类似代替	LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion
MIC29150-3.3WT	MICROCHIP	功能相似	3.3V FIXED POSITIVE LDO REGULATOR, 0.6V DROPOUT, SFM3

与LM3940IT-3.3/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM3940IT-33	TI	获取价格	LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion
LM3940J	NSC	获取价格	1A Low Dropout Regulator for 5V to 3.3V Conversion
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

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