LM3940IS-3.3/NOPB

LM3940IS-3.3/NOPB

The LM3940 is a 1-A low-dropout regulator designed to provide 3.3 V from a 5-V supply. 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 delivered without using an additional heatsink. The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board.

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• 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

Specifications of LM3940IS-3.3/NOPB

• Input Voltage Range: 4.5V to 5.5V

• Output Voltage: 3.3V (fixed)

• Output Current: 1A

• Package Type: TO-263

• Mounting Style: Surface mount

• Number of Pins: 3

Applications of LM3940IS-3.3/NOPB

• Laptop and Desktop Computers

• Post-regulation for switching supplies

• Logic Systems

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Package Include

1 x LM3940IS-3.3/NOPB