LM3940

The LM3940 is a 1A low dropout regulator designed to pro-vide 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 T0-220 package of the LM3940 means that in most ap- plications the full 1A of load current can be delivered without using an additional heatsink.

The surface mount TO-263 package uses minimum board space,and gives excellent power dissipation capability when soldered to a copper plane on the PC board.