LM338 Datasheet – 5-Amp Adjustable Regulators – National

Part Number : LM338, LM338K, LM338T

Function : 5-Amp Adjustable Regulators

Package : TO-3 Steel, TO-220 Type

Manufactures : National Semiconductor


LM338 5A Adjustable Regulator



The LM138, LM338 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1.2V to 32V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation – comparable to many commercial power supplies. The LM138, LM338 family is supplied in a standard 3-lead transistor package.



LM338 datasheet pinout

1. Guaranteed 7A peak output current

2. Guaranteed 5A output current

3. Adjustable output down to 1.2V

4. Guaranteed thermal regulation

5. Current limit constant with temperature


LM338 Datasheet

LM338 pdf