System and method for an adaptive synchronous switch in switching regulators

摘要

Techniques for an adaptive synchronous switch in switching regulators are described, one aspect of which is to achieve a more optimal on/off timing of a synchronous switch that is controlled by the comparator in a feedback control loop and thereby improves power conversion efficiency and system performance; One approach samples a node in the output of the switching regulator and generates a sampled error signal that is analyzed to determine if the current comparator offset is too high or too low relative to a target switching regulator output value at least in part based on the sampled error signal value, and accordingly generates a compensated feedback error signal and applied to the compensated feedback error signal to an input of the comparator to have the effect of a comparator offset adjustment signal.