LM2596HV Adjustable Step-Down DC-DC Power Module (3A)
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Prices updated: 12 Oct 2026
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About this product
A non-isolated buck (step-down) power module built around the LM2596HV regulator, with an adjustable output from 1.23 V to 37 V. It accepts a 3 to 40 V input, is rated for 2 A and reaches a maximum of 3 A when fitted with a heatsink. It is a common choice for powering microcontrollers and sensors from a higher voltage source.
Specifications
- Input voltage
- 3 to 40 V
- Output voltage
- 1.23 to 37 V (adjustable)
- Rated output current
- 2 A (max 3 A with heatsink)
- Efficiency
- Up to 92%
- Switching frequency
- 150 kHz
- Dimensions
- 43.2 x 21 x 14 mm
Frequently asked questions
Do I need a heatsink?
The listing recommends a heatsink for output power above 15 W and when running at the 3 A maximum. Below that, the module can run without one, but heat dissipation should be considered in enclosed spaces.
How do I set the output voltage?
Turn the adjustment potentiometer while measuring the output with a multimeter. The input voltage must be higher than the output voltage you want to set.
