The MPQ8633B-H is a fully integrated, high-frequency, synchronous step-down converter. It offers a compact solution that can achieve up to 20A of output current (I_OUT) across a wide input voltage (V_IN) range, with excellent load and line regulation. The MPQ8633B-H operates at high efficiency across the entire I_OUT load range.

Internally compensated constant-on-time (COT) control provides fast transient response and eases loop stabilization. The adjustable 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 the output voltage (V_OUT) or V_IN.

The V_OUT start-up ramp is controlled via an internal timer (1ms). For a longer internal timer, add a capacitor to the TRK/REF pin. An open-drain power good (PGOOD) signal indicates whether V_OUT is within its nominal voltage range. If the input supply fails to power the MPQ8633B-H, then PGOOD 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 thermal shutdown.

The MPQ8633B-H requires a minimal number of readily available, standard external components, and is available in a QFN-21 (3mmx4mm) package.