Datasheet Texas Instruments LM3940IMPX-3.3 — 数据表

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SNVS114G – MAY 1999 – REVISED FEBRUARY 2015 LM3940 1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion
1 Features 3 Description The LM3940 is a 1-A low-dropout regulator designed
to provide 3.3 V from a 5-V supply. 1 Input Voltage Range: 4.5 V to 5.5 V
Output Voltage Specified over Temperature
Excellent Load Regulation
Specified 1-A Output Current
Requires only One External Component
Built-in Protection against Excess Temperature
Short-Circuit Protected 2 Applications Laptop and Desktop Computers
Logic Systems The LM3940 is ideally suited for systems which
contain both 5-V and 3.3-V logic, with prime power
provided from a 5-V bus.
Because the LM3940 is a true low dropout regulator,
it can hold its 3.3-V output in regulation with input
voltages as low as 4.5 V.
The TO-220 package of the LM3940 means that in
most applications the full 1 A of load current can be …