SNVS114G May 1999 – February 2015 LM3940
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.
|PART NUMBER||PACKAGE||BODY SIZE (NOM)|
|LM3940||SOT-223 (4)||6.50 mm x 3.50 mm|
|DDPAK/TO-263 (3)||10.18 mm x 8.41 mm|
|TO-220 (3)||14.986 mm x 10.16 mm|