Part Number : LM317

Function : 1.5A, 40V, Three-Terminal Adjustable Regulator

Package : SOT-223 Type, TO-220 Type

Maker : Texas Instruments

Pinouts :
LM317 datasheet

Description : 

The LM137 / LM337-N are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −1.2V to −37V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads.

The LM137/LM337-N serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137/LM337-N are ideal complements to the LM117/LM317 adjustable positive regulators.


1. Output Voltage Adjustable from −1.2V to −37V
2. 1.5A Output Current Specified, −55°C to +150°C
3. Line Regulation Typically 0.01%/V
4. Load Regulation Typically 0.3%
5. Excellent Thermal Regulation, 0.002%/W
6. 77 dB Ripple Rejection
7. Excellent Rejection of Thermal Transients
8. 50 ppm/°C Temperature Coefficient
9. Temperature-independent Current Limit
10. Internal Thermal Overload Protection
11. P+ Product Enhancement Tested
12. Standard 3-lead Transistor Package
13 Output is Short Circuit Protected

Datasheet PDF Download :
LM317 pdf

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2021/06/21 11:23 2021/06/21 11:23