MPQ448x Step-Down Converters Monolithic Power Systems (MPS) MPQ448x Step-Down Converters with switching mode offer a 5V at 3A Type-C configurational channel for the USB port. These step-down converters achieve up to 6A of output current with excellent load and line regulation over a wide input supply range. The MPQ448x converters offer single and dual USB current-limit switch variants with options for programmable frequency and spread spectrum features. These converters control the power of USB ports and also provide support for Dedicated Charging Ports (DCP).