Patent ID: 7973523

Claim:
A reverse current sensing (RCS) regulator system comprising: a driver logic circuit that switches between alternately turning on and off a high side field effect transistor (HS FET) and a low side field effect transistor (LS FET) to provide an inductor current through an inductor and to charge a capacitor and provide a regulator output voltage to a load; a RCS comparator that monitors a drain voltage of the LS FET and is configured to switch states at a zero crossing point to provide an indication of the start of a reverse current condition; and a RCS evaluator that measures the drain voltage of the LS FET upon receiving an indication that the LS FET has been turned off by the driver logic circuit and adjusts an offset to the RCS comparator to adjust the trip point of the RCS comparator relative to the drain voltage if the measured drain voltage falls outside a predetermined threshold.