MP8859

DESCRIPTION The MP8859 is a synchronous, 4-switch, integrated buck-boost converter capable of regulating the output voltage from a 2.8V to 22V wide input voltage range with high efficiency. The integrated output voltage scaling and adjustable output current limit functions meet the USB power delivery (PD) requirement. The MP8859 uses constant-on-time (COT) control in buck mode and constant-off-time control in boost mode, providing fast load transient response and smooth buck-boost mode transient. The MP8859 provides auto PFM/PWM or forced PWM switching modes, programmable output constant current (CC) current limit, which supports flexible design for different applications. Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), programmable soft start, and thermal shutdown. The MP8859 is available in a 16-pin QFN (3mmx3mm) package. MP8859 2.8 - 22V VIN, 3A IOUT, 4-Switch, Integrated Buck-Boost Converter with I2C Interface FEATURES  Wide 2.8V to 22V Operating Input Voltage Range  1V (1) to 20.47V Output Voltage Range (5V Default) with 10mV Resolution through I2C  3A Output Current or 4A Input Current  Four Low RDS(ON) Internal Buck Power MOSFETs  Adjustable Accurate CC Output Current Limit with Internal Sensing MOSFET via I2C  500kHz Switching Frequency  Output Over-Voltage Protection (OVP) Hiccup  Output Short-Circuit Protection (SCP) with Hiccup  Over-Temperature Warning and Shutdown  I2C Inter...