Monolithic Power Systems’ MPQ4481 integrates a monolithic, step-down, switch-mode converter with a single USB current-limit switch and Type-C 5 V @ 3 A mode configuration channel for the USB port. The MPQ4481 achieves 3 A of output current with excellent load and line regulation over a wide input supply range. The output of the USB switch is current-limited. The USB port supports DCP schemes for battery charging specification (BC1.2), divider mode, 1.2 V/1.2 V mode, and USB Type-C™ 5 V @ 3 A DFP mode without the need for outside user interaction. Full protection features include hiccup current limiting, output overvoltage protection (OVP), and thermal shutdown. The MPQ4481 requires a minimal number of readily available, standard, external components and is available in a QFN-26 (5 mm x 5 mm) package.