Monolithic Power Systems (MPS) EVQ2179B-QH-00A Evaluation Board

The MPS MPQ2179B-AEC1 converters achieve a 3A output current (I_OUT) from a 2.5V to 6V input voltage (V_IN) range, with excellent load and line regulation. The output voltage (V_OUT) can be regulated to as low as 0.5V. A 100% maximum duty cycle can be reached in low-dropout (LDO) mode. Constant-on-time (COT) control offers a simpler control loop and faster transient response. Using V_IN feed-forward, the MPQ2179B-AEC1 maintains a nearly constant switching frequency (f_SW) across the input and load ranges. Forced continuous conduction mode (FCCM) provides a stable frequency and a lower output ripple.

An open-drain power good (PG) signal indicates a nominal voltage after the soft-start time. PG pulls high if the feedback voltage (V_FB) reaches 90% of the reference voltage (V_REF); PG pulls to GND when V_FB drops to 84% of V_REF. Full protection features include cycle-by-cycle current limiting, short-circuit protection (SCP), reliable over-voltage protection (OVP), and thermal protection with automatic recovery.