The LM3940 is a 1A low dropout regulator designed to provide3.3V from a 5V supply.The LM3940 is ideally suited for systems which contain both5V and 3.3V logic, with prime power provided from a 5V bus.Because the LM3940 is a true low dropout regulator, it canhold its 3.3V output in regulation with input voltages as low as4.5V.
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