Part#: LM3940IS-3.3/NOPB
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Part Category: Regulators

Manufacturer: Texas Instruments High-Performance Analog

Description: Fixed Positive LDO Regulator, 3.3V, 1V …

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.