The MPQ8875A is a 36V, monolithic, synchronous buck-boost DC/DC converter. The wide 2.2V to 36V input voltage range makes this device well-suited for multi-purpose automotive and industrial applications. The proprietary constant-on-time (COT) control, as well as the fully integrated, four-switch configuration, allow the chip to flexibly change the converter topology between buck, boost, and buck-boost mode. This optimizes performance and efficiency with input voltages that are above, below, or equal to the output voltage. It also ensures seamless transitions between the adjacent operational regions.
The MPQ8875A is controlled separately via a standard I2C interface. The various parameters can be adjusted by writing the settings to the device without any hardware changes required.
The switching frequency can be configured between 200kHz and 1MHz, or it can be synchronized between 250kHz and 1MHz via an external clock signal. In addition, the configurable frequency spread spectrum function can dither the switching frequency periodically for improved EMI performance.
Robust fault protections include input under-voltage lockout (UVLO), input over-voltage protection (OVP), cycle-by-cycle peak current limiting, output OVP, output short-circuit protection (SCP), and thermal shutdown. The built-in power good function can indicate whether the output voltage is regulated properly.
The MPQ8875A is available in a thermally enhanced QFN-34 (4mmx5mm) package.
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