the fr9831h is a synchronous step-down dc/dc converter that provides wide 4.5v to 40v input voltage range and 0.6a continuous load current capability.
the fr9831h fault protection includes cycle-by-cycle current limit, uvlo and thermal shutdown. the soft-start function prevents inrush current at turn-on. this device uses current mode control scheme which provides fast transient response. internal compensation function reduces external compensation components and simplifies the design process. in shutdown mode, the supply current is less than 10μa.