The LP873222-Q1 is designed to meet the power management requirements
in automotive applications. The device contains two step-down DC-DC
converters and two linear regulators and general-purpose digital-output signals. The device is
controlled by an I2C-compatible serial interface and by an enable
The automatic PWM/PFM (AUTO mode) operation gives high efficiency over a wide output-current
range. The LP873222-Q1 supports remote
voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) thus
improving the accuracy of the output voltage. In addition the switching clock can be forced to PWM
mode and also synchronized to an external clock to minimize the disturbances.
The LP873222-Q1 device
programmable start-up and shutdown delays and sequences including GPO signals synchronized to the
enable signal. During start-up and voltage change, the device controls the output slew rate to minimize
output voltage overshoot and the in-rush current.
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