Abstract: A semiconductor device includes a main circuit and a control circuit. The main circuit includes a plurality of series circuits that are connected in parallel to one another. Each series circuit includes a high-side switching element and a low-side switching element that are connected in series. The control circuit includes first to third input terminals through which a serial drive signal serving as a driving signal of each high-side switching element and each low-side switching element is inputted, a first clock signal, and a second clock signal are respectively inputted, and a plurality of output terminals. The control circuit holds the serial drive signal based on the first clock signal, and based on the second clock signal outputs, to each high-side switching element and each low-side switching element, parallel signals generated from the serial drive signal.