Anterwell Technology Ltd.
Anterwell Technology Ltd. Large Original stock of IC Electronics Components, Transistors, Diodes etc. High Quality, Reasonable Price, Fast Delivery.
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General Description Connection Diagram/Ordering Information
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 with input voltages as low
as 4.5V.
The T0-220 package of the LM3940 means that in most
applications 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.
Features
♦ 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
♦ Laptop/Desktop Computers
♦ Logic Systems