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SOT223-3L
Integrated Circuits (ICs)

LM3940IMPX-3.3/NOPB

Active
Texas Instruments

1-A, LOW-DROPOUT VOLTAGE REGULATOR FOR 5-V TO 3.3-V CONVERSION

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Search across all available documentation for this part.

DocumentsProduct Change Notice ENLM3940 1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion datasheet (Rev. G)+1
SOT223-3L
Integrated Circuits (ICs)

LM3940IMPX-3.3/NOPB

Active
Texas Instruments

1-A, LOW-DROPOUT VOLTAGE REGULATOR FOR 5-V TO 3.3-V CONVERSION

Deep-Dive with AI

DocumentsProduct Change Notice ENLM3940 1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion datasheet (Rev. G)+1

Technical Specifications

Parameters and characteristics for this part

SpecificationLM3940IMPX-3.3/NOPB
Current - Output1 A
Mounting TypeSurface Mount
Number of Regulators1
Operating Temperature [Max]125 °C
Operating Temperature [Min]-40 °C
Output ConfigurationPositive
Output Type1.81 mOhm
Package / CaseTO-261AA, TO-261-4
Supplier Device PackageSOT-223-4
Voltage - Input (Max) [Max]7.5 V
Voltage - Output (Min/Fixed)3.3 V
Voltage Dropout (Max) [Max]0.2 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
ArrowN/A 2000$ 0.81
4000$ 0.80
DigikeyCut Tape (CT) 1$ 1.74
10$ 1.57
25$ 1.48
100$ 1.26
250$ 1.18
500$ 1.03
1000$ 0.86
Digi-Reel® 1$ 1.74
10$ 1.57
25$ 1.48
100$ 1.26
250$ 1.18
500$ 1.03
1000$ 0.86
Tape & Reel (TR) 2000$ 0.80
6000$ 0.77
10000$ 0.74
Texas InstrumentsLARGE T&R 1$ 1.31
100$ 1.08
250$ 0.78
1000$ 0.58

Description

General part information

LM3940 Series

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

The LM3940 is ideally suited for systems which contain both 5-V and 3.3-V logic, with prime power provided from a 5-V bus.

Because the LM3940 is a true low dropout regulator, it can hold its 3.3-V output in regulation with input voltages as low as 4.5 V.