The LM317 is a three pin adjustable positive voltage regulator capable of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V.
The LM317 is a floating, three‑terminal positive voltage regulator that can supply more than 1.5 A over an output range of 1.2 V to 37 V. It requires only two external resistors to set the output voltage and includes internal current limiting, thermal overload protection, and safe‑area compensation.
The device is offered in surface‑mount D2PAK and standard 3‑lead transistor packages and is used in a wide variety of applications such as local on‑card regulation, programmable output regulators, and precision current sources. Recommended external components include a 0.1 µF disc or 1.0 µF tantalum input bypass capacitor and protection diodes for high‑voltage operation.
| Maximum Output Current | 1.5 A |
|---|---|
| Output Voltage Range | 1.2 V to 37 V |
| Thermal Resistance (J‑A) | 65 °C/W (case 221A) |