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National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
This document provides technical specifications for the LM117 and LM317 series of adjustable 3-terminal positive voltage regulators. These devices are capable of supplying over 1.5A over an output range of 1.2V to 37V and require only two external resistors to set the output voltage. The datasheet details features such as current limit, thermal overload protection, and safe area protection.
Read onlineNational Semiconductor LM317 specifications
| Output Current | 1.5A |
|---|---|
| Output Voltage Range | 1.2V to 37V |
| Line Regulation (LM317A) | 0.01%/V |
| Load Regulation (LM117) | 0.3% |
| Ripple Rejection Ratio | 80 dB |
Source: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
All National Semiconductor LM317 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet 25 p
- National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet 26 p
- National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet 25 p
- National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet 25 p
- National Semiconductor LM117/LM317A/LM317 Datasheet 28 p
- National Semiconductor LM117/LM317A/LM317 Adjustable Regulator Datasheet 26 p
Questions answered in these manuals
What is the minimum output voltage?
The adjustable output can be set down to 1.2V.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
Does the device have short-circuit protection?
Yes, the output is short-circuit protected.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
What is the reference voltage of the LM117 regulator?
The LM117 develops a nominal 1.25 V reference voltage between the output and adjustment terminals.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
What is the maximum output current for the TO‑3 package?
The TO‑3 (K) package supports up to 1.5 A output current.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
What is the maximum output current of the LM117/LM317 series?
The regulators can deliver up to 1.5 A of output current.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet
What input‑to‑output voltage differential is allowed?
The devices tolerate a differential of up to 40 V.
From: National Semiconductor LM117/LM317A/LM317 3-Terminal Adjustable Regulator Datasheet