The LM117/LM217/LM317 are ST's 1.2V to 37V adjustable voltage regulators with an output current of over 1.5A and a wide input voltage range. They have a 0.1% line and load regulation, are suitable for high voltage floating operation and have a full range of protection functions, including current limiting, thermal shutdown and SOA control.
The LM117, LM217, and LM317 are monolithic adjustable voltage regulators offered in TO‑220, TO‑220FP, TO‑3 and D2PAK packages. They deliver a selectable output voltage from 1.2 V to 37 V and can supply more than 1.5 A of load current, with built‑in protections such as current limiting, thermal shutdown and safe‑operating‑area control.
The document includes pin‑out diagrams, absolute maximum ratings, detailed electrical characteristics, typical performance curves, and mechanical data for each package. Revision history and package dimensions are also provided.
| Output voltage range | 1.2 V to 37 V |
|---|---|
| Maximum output current | >1.5 A |
| Line regulation | 0.1 % |
| Input‑reference differential voltage (absolute max) | 40 V |
| Operating junction temperature (LM317) | –25 °C to 150 °C |
| Storage temperature range | ‑65 °C to 150 °C |
| Available packages | TO‑220, TO‑220FP, TO‑3, D2PAK |
The output voltage can be adjusted from 1.2 V to 37 V.
They are designed to supply more than 1.5 A of load current.
They are available in TO‑220, TO‑220FP, TO‑3 and D2PAK packages.
The maximum input‑reference differential voltage is 40 V.