The LM3940 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply. It is a true low dropout regulator, it can hold its 3.3V output in regulation with input voltages as low as 4.5V.
The regulator is available in a variety of hermetically sealed packages and has the option of being screened to both JAN and Space levels

FEATURES
• OUTPUT VOLTAGE SPECIFIED OVER TEMPERATURE RANGE
• EXCELLENT LOAD REGULATION
• GUARANTEED 1A OUTPUT CURRENT
• BUILT IN PROTECTION AGAINST EXCESS TEMPERATURE
• SHORT CIRCUIT PROTECTED