MPQ8873-AEC1

The MPQ8873 is a monolithic, DC/DC, synchronous buck-boost converter. Its wide 2.2V to 36V input voltage (V_IN) range is well-suited for multi-purpose automotive and industrial applications. Proprietary constant-on-time (COT) control and a fully integrated, four-switch power converter configuration allow the chip to flexibly change the converter topology between buck mode, boost mode, and buck-boost mode. This optimizes performance and efficiency at input voltages above, below, or equal to the output voltage (V_OUT). It also ensures seamless transitions between the adjacent operational regions.

The MPQ8873 is controlled via a standard I²C interface. The various parameters can be adjusted by writing the settings in the device. No hardware changes are required to adjust the parameters.

The switching frequency (f_SW) can be set between 200kHz and 1MHz, or can be synchronized between 250kHz and 1MHz via an external clock. The configurable frequency spread spectrum can dither f_SW periodically to improve EMI performance.

Full protection features include input under-voltage lockout (UVLO), input over-voltage protection (OVP), output OVP, output short-circuit protection (SCP), cycle-by-cycle peak current limiting, and over-temperature shutdown. The built-in power good (PG) indicator indicates whether VOUT is regulated properly.

The MPQ8873 is available in a thermally enhanced QFN-34 (4mmx5mm) package.