This is a demonstration board for the PM6680A dual synchronous step-down controller with adjustable output voltages and LDO function from STMicroelectronics company. The board has the following features: constant on-time control allows very fast load transients; 6 V to 36 V input voltage range; 5 V auxiliary output voltage; adjustable switching outputs; lossless current sensing; negative current limit; soft-start internally fixed at 2.8 ms; soft-end for output discharge; 200 kHz / 300 kHz, 300 kHz / 400 kHz, 400 kHz / 500 kHz (OUT1 / OUT2 selectable switching frequency); selectable pulse skip and no-audible skip modes at light loads; independent power good signals