LM138 - LM238 - LM338 Three-terminal 5 A adjustable voltage regulators
The LM138, LM238, and LM338 are three-terminal adjustable positive voltage regulators capable of supplying in excess of 5 A over an output range of 1.2 V to 32 V. These devices are supplied in a standard 3-lead TO-3 transistor package and require only two resistors to set the output voltage. A unique feature is time-dependent current limiting, which allows peak currents of up to 12 A for short periods to handle heavy transient loads.
| Output current | 5 A |
|---|---|
| Peak output current | 7 A |
| Output voltage range | 1.2 V to 32 V |
| Line regulation | 0.005 %/V |
| Load regulation | 0.1 % |
| Package type | TO-3 |
The LM138 is rated for operation from -55 °C to 150 °C.
The maximum input-output voltage differential is 35 V.
The typical line regulation is 0.005 %/V.