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Small green circuit board with blue potentiometer, digital display, and screw terminals

Ruth's sister

Ruth's sister Buck Step-Down LM2596 Power Converter Module

SKU CH-XH0H-DWE65

Step-down converter module adjusts DC 2.5-40V input to 1.25-37V output at up to 3A with built-in voltmeter display

  • Adjustable output from 1.25 V to 37 V for flexible projects
  • Built-in voltmeter with ±0.1 V accuracy for precise monitoring
  • 92 % peak conversion efficiency reduces heat and power loss
  • Input reverse-polarity, output short-circuit and thermal shutdown protections included
  • Compact 6.6 cm × 3.6 cm × 1.4 cm module fits tight enclosures

Buck Step-Down LM2596 Module

This buck step-down converter module accepts a DC input range of 2.5V to 40V and provides an adjustable output from 1.25V to 37V at up to 3A. It suits hobbyists and engineers who need a compact regulated supply for prototyping or small-load applications. The built-in LED digital voltmeter displays input or output voltage with a selectable readout.

Installation and Common Issues

The module measures approximately 6.6cm by 3.6cm by 1.4cm, fitting easily onto a breadboard or inside a small enclosure. Solder wires to the clearly marked input and output pads, observing polarity because the unit includes input reverse polarity protection. Thermal shutdown activates if the board overheats, and output short-circuit protection prevents damage during wiring mistakes.

Capacity Limits and Headroom

Peak conversion efficiency reaches 92 percent at a switching frequency of 150KHz, keeping heat low for moderate loads. The 3A maximum output current defines the practical ceiling; sustained draws near this limit will raise the temperature toward the 85°C upper operating bound. The voltmeter covers 0 to 40V with a ±0.1V error, adequate for setting the output but not a substitute for a calibrated multimeter.

Highlights

  • Adjustable output from 1.25 V to 37 V for flexible projects
  • Built-in voltmeter with ±0.1 V accuracy for precise monitoring
  • 92 % peak conversion efficiency reduces heat and power loss
  • Input reverse-polarity, output short-circuit and thermal shutdown protections included
  • Compact 6.6 cm × 3.6 cm × 1.4 cm module fits tight enclosures

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the module is regulating voltage correctly after wiring it?

Press the right button until the green OUT LED lights; the display then shows the output voltage, which should read between 1.25 V and 37 V when the input is within the 2.5 V to 40 V range.

What comes in the package and what extra items are needed?

The box contains one LM2596 step-down module measuring approximately 6.6 cm by 3.6 cm by 1.4 cm with a built-in voltmeter and red/green LEDs; you must supply your own DC power source and connecting wires.

Which input and output voltage combination should I select for my project?

Choose any input between 2.5 V and 40 V and set the output anywhere from 1.25 V up to 37 V, keeping the output at least 1.25 V below the input and the load under 3 A.

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