The LM317 is an adjustable three-terminal positive voltage regulator capable of supplying 1.5A over an output range of 1.25V to 37V. The output voltage is set using two external resistors, making it very flexible for variable power supply designs.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | ADJUST | Sets output voltage via resistor divider | ADC |
| 2 | OUTPUT | Regulated adjustable output | PWR |
| 3 | INPUT | Unregulated DC input | PWR |