Power supply controller and mechanical apparatus using the same

摘要

There is a need for improving switching regulator characteristics and providing a stable power supply controller. The power supply controller uses a battery (1) and either or both functions of stepping up and stepping down a battery voltage (1a). The power supply controller includes a means (20a, 20b, 20c) that prevents a ripple voltage from occurring by stopping the up conversion function for a switching operation in connection with a battery (1) during a predetermined period without changing conditions for a conventional switching device or smoothing circuit (4) and fast stabilizes a primary voltage (6) using only the down conversion function.