The LP87561I-Q1 is designed to meet the power management requirements of
the latest processors and platforms in various automotive power applications. The device contains
four step-down DC-DC converter cores, which are configured as
4-phase single output. The device is controlled by an
I2C-compatible serial interface and by enable signals.
The automatic PFM/PWM (AUTO mode) operation
together with the automatic phase adding/shedding maximizes efficiency over a wide
output-current range. The LP87561I-Q1 supports remote
multi-phase outputs 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 LP87561I-Q1 device supports load-current measurement without the
addition of external current-sense resistors. In addition, the LP87561I-Q1 device
supports programmable start-up and shutdown delays and sequences synchronized to enable signals.
The sequences can also include GPIO signals to control external regulators, load switches and
processor reset. 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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