XL4015 DC-DC Converter

XL4015 DC-DC Converter

[XL4015 Image]

XL4015 DC-DC Converter High Efficiency Step Down Voltage Regulator from 4.0-38V to 1.25V-36V 5A Adjustable Power Supply Step Down Module. The ones I bought have a built-in Voltmeter.

Note that the specs seem to vary slightly from site to site

Input DC 5.0 to 36V The input voltage must be more than 1.5V higher than the output voltage.
Output DC 1.25V to 32V @ 5A voltage continuously adjustable
Size 6.82 x 3.88 x 1.5 cm (l x w x h)


  • Power up the module with a regulated DC power supply (I use a 12v switched DC supply).
  • A short press of the right hand button (looking at the display) is used to select the input or the output voltage display. A small LED lights up at above the left and right button to indicate the input or the output voltage selected.
  • To Calibrate:
    • Press the right hand button for 2 or more seconds enables the module calibration mode
    • Use the right hand button to select input or output voltage to calibrate. The associated LED will blink.
    • Measure the selected input or output voltage with a multimeter and use the left and right buttons to decrease or increase the display value to match the multimeter.
    • When the desired value is reached, press the right hand button for 3 seconds to store the configuration.
    • Repeat for both input and output voltages.
  • The left hand switch can be used to turn the display off.