D-Sun 3A Step Down Switching Voltage Regulator / 3A DC-DC Step Down BUCK Converter Board - WIT Computers
75V to 10V DC-DC Buck Converter Circuit
Amazon.com: DC-DC Buck Converter Step Down Module, DC 6.5V-60V to 1.25-30V Maximum 10A Adjustable Power Supply Voltage Regulator Module, Voltage Step Down Converter Board : Electronics