LM3940 Datasheet (National Semiconductor)

LM3940, 1A Low Dropout Regulator

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 wi

LM3940 Features

* n n n n n n Output voltage specified over temperature Excellent load regulation Guaranteed 1A output current Requires only one external component Built-in protection against excess temperature Short circuit protected Applications n Laptop/Desktop Computers n Logic Systems Typical Application DS01