Voltage Regulator – Adjustable


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SKU: ELC-053 Manufacturer: Fairchild Semiconductor Mfg Part Number: LM317T Categories: , Tag:


A voltage regulator is used to reduce and regulate the voltage of a circuit. Components such as sensors and microcontrollers typically need a very specific regulated voltage to ensure accurate readings or stable operation. These simple low drop out regulators are perfect for that job.

This specific regulator has a variable output and will convert up to 40VDC to a regulated voltage between 1.2 and 37.0VDC. To set the output voltage these regulators do require a couple external components. Typically a resistor of a given value is placed between pins Vadj and Vo with a potentiometer between Vadj and Ground. For a wiring diagram and to calculate the resistor value please consult the datasheet below. Just like our fixed regulators, we do recommend using a few capacitors with these to ensure stability.

Please note: As the load increases towards the maximum rating on these regulators they do tend to get quite warm. The temperature increase is also proportional to the input voltage; the higher the input voltage the warmer this regulator will run. Basically, the higher the input voltage, the lower the sustainable output current will be. Heatsinks are always a good idea with these chips!



  • Voltage Output: 1.2 to 37.0V
  • Current Output: 1.5A
  • Voltage Input: Up to 40.0V




  Difficulty Level

Soldering Skill: N/A
Prototyping Skill: Intermediate
Programming Skill: N/A

  Product Certifications

  Product Attributes

Weight: 2 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

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