LM117/LM317A/LM317 3-Terminal Adjustable Regulator is a product of 鼎好电子有限公司, is 3-terminal positive voltage regulators, capable of supplying in excess of 1.5A over a 1.2V to 37V output range.
The LM117 series of adjustable 3‑terminal positive voltage regulators can supply more than 1.5 A over a 1.2 V to 37 V output range. They require only two external resistors to set the output voltage and include current limit, thermal overload, and safe‑area protection.
Features include 1 % output voltage tolerance (LM317A), 0.01 %/V line regulation (LM317A), 0.3 % load regulation (LM117), 80 dB ripple rejection, and short‑circuit protection. The devices are offered in several TO‑3, TO‑220, TO‑263, SOT‑223, TO‑39, and other packages, each with specified current ratings.
| Output current (max) | 1.5 A |
|---|---|
| Output voltage tolerance (LM317A) | ±1 % |
| Line regulation (LM317A) | 0.01 %/V |
| Load regulation (LM117) | 0.3 % |
| Ripple rejection | 80 dB |
| Reference voltage | 1.25 V |
The LM117 develops a nominal 1.25 V reference voltage between the output and adjustment terminals.
An optional output capacitor in the range of 1 µF to 1000 µF can be added to improve transient response.
Yes, the output is short‑circuit protected.