The LM3940 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply. The LM3940 is ideally suited for systems that 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.
LM3940 Pinout
LM3940 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | INPUT |
| 2 | GND |
| 3 | OUTPUT |
LM3940 Key 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
Application
- Laptop/Desktop Computers
- Logic Systems
You can download this datasheet for LM3940 1A Low Dropout 5V to 3.3V Voltage Regulator -Datasheet from the link given below:
