The MPQ8633A-H is a fully integrated, high-frequency, synchronous step-down converter. It offers a very compact solution that can achieve up to 12A of output current (I_OUT) across a wide input voltage (V_IN) range, with excellent load and line regulation. The MPQ8633A-H operates at high efficiency across a wide I_OUT load range.

Internally compensated constant-on-time (COT) control provides fast transient response and eases loop stabilization. The selectable switching frequency (f_SW) can be set to 600kHz, 800kHz, or 1000kHz by configuring the MODE pin. This maintains a constant f_SW, regardless of V_IN and the output voltage (V_OUT).

During start-up, the internal soft-start time (t_SS) (1ms) ramps up V_OUT in a controlled manner. t_SS can be increased by adding a capacitor on the TRK/REF pin. An open-drain power good (PG) signal indicates whether V_OUT is within its nominal voltage range. If the input fails to supply power to the MPQ8633A-H, then the PG voltage (V_PG) is clamped at about 0.7V via an external pull-up voltage.

Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP).

The MPQ8633A-H requires a minimal number of readily available, standard external components, and is available in a QFN-21 (3mmx4mm) package.