The APL3547A is a power-distribution switch with some protection functions. The device incorporates a N channel MOSFET power switch that is controlled by an enable logic pin and has a SS pin dedicated to soft start ramp-up rate control that can be used in application where the inrush current is concerned. The device integrates some protection features, including current-limit protection, short-circuit protection, overtemperature protection, and UVLO. The current-limit and short-circuit protection can protect down-stream devices from catastrophic failure by limiting the output current at current-limit threshold during over-load or short-circuit events.When VOUT drops below VIN-1V, the devices limit the output current to a lower and safe level. The overtemperature protection function shuts down the N-channel MOSFET power switch when the junction temperature rises beyond 150o C and will automatically turns on the power switch when the temperature drops by 50o C. The UVLO function keeps the power switch in off state until there is a valid input voltage present. The current limit in APL3547A can be set by connecting resistor from the current limit adjustable pin ISET to ground. The device is available in lead free SOP-8P and TDFN2x2- 6 packages.