LM117 PDF Datasheet – Adjustable Voltage Regulator

Part number : LM117, LM117K, LM117H

Functions : 3-Terminal Adjustable Regulator

Package : TO-3 Metal Can, TO-39 Metal Can type

Manufactures : National Semicondcutor, STMicroelectronics


LM117 Adjustable Voltage Regulator


The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, the LM117 is packaged in standard transistor packages which are easily mounted and handled.

In addition to higher performance than fixed regulators, the LM117 series offers full overload protection available only in IC’s. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.


LM117 pinout datasheet

The texts in the PDF file :


1. Guaranteed max. 0.3% load regulation (LM117)
2. Guaranteed 1.5A output current
3. Adjustable output down to 1.2V
4. Current limit constant with temperature
5. P+ Product Enhancement tested
6. 80 dB ripple rejection
7. Output is short-circuit protected

[ … ]

Application Circuit

LM117 Circuit

LM117 Datasheet