The LM2596 HV DC-DC Buck Converter with voltage rating 4.5-40V to 3-35V. is a step down power module that can be  adjustable using a potentiometer that is mounted on the board. Adjustment method is to first input power (between 4.5-50V) then a multimeter to monitor the output voltage and adjust potentiometer (usually boost turn clockwise and buck turn counterclockwise).

The terminal marked  IN+input is where the  positive is mounted and the terminal marked  IN- input is where the negative terminal is mounted.

The terminal marked OUT+ is where the output positive terminal is mounted and the terminal marked OUT-  is where the output negative terminal is mounted.

It has a off load power consumption of about 6mA.




Input Voltage (V)

4 ~ 40 VDC

Output Voltage(V)

3 ~ 35

Max. Output Current (A)


Conversion efficiency


Switching frequency

150 KHz

Output ripple

30mA (maximum)

Load Regulation

± 0.5%

Voltage Regulation

± 0.5%

Dynamic Response speed

5% 200uS

Operating Temperature (°C)

-40 to 90



LM2596 DC-DC 3A Buck Step-Down, Adjust Vout, Input: DC 4.5-50V