0-30V, 0-7A adjustable switching power supply

The DC-DC buck converter is a well-known topology in the electronics field and a widely used circuit in electronic equipment. Buck converters reduce the input voltage while increasing the output current. In this design the author discusses a DC to DC buck converter that can be effectively used as a switching power supply. Output voltage and current are adjustable: 1.25V to 30V and 10mA to 6A (continuous). The power supply supports constant voltage (CV) and constant current (CC) functions. Two LED indicators show CV and CC status. The circuit is compact and both sides of the PCB are used for mounting components. Specifications Input voltage: 8V to 35VDC Output voltage: 1.25V to 32VDC Output current (continuous): 10mA to 6A Output current (short-term): 7A to 8A Output noise (no load): 6mVrms (9mVp-p) Output noise (6A load): 7mVrms (85mVp-p) Output noise (6A load, 16P average): 50mVp-p Efficiency: up to 96%