Four-phase 3-Mhz 1-V 16-A DC/DC buck converter with integrated switches

The

LP875761-Q1 device 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 a 4-phase output in forced-PWM mode. The device is

controlled by an I2C-compatible serial interface and by enable

signals.

The

LP875761-Q1 supports remote

differential-voltage sensing for multiphase outputs to compensate IR drop between

the regulator output and the point-of-load (POL) which improves the accuracy of the

output voltage. The switching clock can be forced to PWM mode and also synchronized

to an external clock to minimize the disturbances.

The

LP875761-Q1 device supports load-current

measurement without the addition of external current-sense resistors. The LP875761-Q1 device also 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, the device controls the output slew rate to minimize

output-voltage overshoot and in-rush current.