SK4023B is an RCA semiconductor part designed for power management purposes. It is a monolithic integrated circuit in a 16-lead SOT-223 package, designed to control input voltage transients, over voltage protection, and provide very low-dropout current regulation. It is capable of delivering up to 500mA of output current and features a low 80mV dropout voltage at 400mA. It also features over voltage, current-limit, thermal protection, and reverse polarity protection. The SK4023B is suitable for power management applications in consumer, computing, and automotive electronics systems.