DC 300W 20A CC CV Step Down Converter Voltage Buck Module Constant Current Adjustable Current Source Module DC 6-40V To 1.2-35V Voltage Regulator Buck Converter. Feature: Wide Input Voltage Range, High Efficiency, Advanced Design, Easy Wiring, Enhanced Heat Dissipation. Specification: Input voltage 6V to 40V DC, Output voltage 1.2V to 35V DC, Output current 20A, Current limit range 0.2-20A, Low voltage drop 3V, Operating frequency 150KHZ, Efficiency 95%, Output ripple ≤50mv.