POINT OF LOAD REGULATOR SYNCHRONIZATION AND PHASE OFFSET

摘要

An electronic system includes a multiple POL regulators that supply a regulated voltage to a component within the electronic system. A phase spreading scheme may be implemented so that the POL regulators operate under various phases to reduce voltage noise, high input capacitance, and high radiated emissions. One phase spreading scheme includes a single POL regulator controlling phase spreading so that the other POL regulators operate under different phases. Another phase spreading scheme includes an upstream POL regulator determining a phase offset that may be passed to a downstream POL regulator so that the downstream POL regulator may operate under a different phase relative to the upstream POL regulator.

主权项

1. An electronic system including at least three point of load (POL) regulators that supply a regulated voltage to a component within the electronic system, the electronic system comprising:
a master POL regulator comprising a first SYNC OUT pin and a second SYNC out pin; a first controlled POL regulator comprising a SYNC IN pin communicatively connected to the first SYNC OUT pin of the master POL regulator, and; a second controlled POL regulator comprising a SYNC IN pin communicatively connected to the second SYNC OUT pin of the master POL regulator.