MP28167GQ Integrated Buck-Boost Converters Monolithic Power System (MPS) MP28167GQ 4-Switch Integrated Buck-Boost Converters can regulate the output voltage from 2.8V to 22V wide input voltage range with high efficiency. The MP28167GQ implements a constant-on-time control in buck mode and constant-off-time control in boost mode, delivering a fast load transient response as well as smooth buck-boost mode transient.