LM3940IMPX-3.3 Texas Instruments IC REG LINEAR 3.3V 1A SOT223-4

Categories Integrated Circuits (ICs)
PMIC - Voltage Regulators - Linear
Manufacturer Texas Instruments
Series-
Packaging Cut Tape (CT)
Part Status Discontinued at Digi-Key
Output ConfigurationPositive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max)7.5V
Voltage - Output (Min/Fixed)3.3V
Voltage - Output (Max)-
Voltage Dropout (Max)0.2V @ 100mA
Current - Output 1A
PSRR-
Control Features-
Protection Features Over Temperature, Short Circuit
Operating Temperature-40°C ~ 125°C
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Supplier Device PackageS OT-223-4

Base Part Number LM3940

Description
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. The TO-220 package of the LM3940 means that in most applications the full 1 A 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.

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