Patent ID: 7518351
Filing Date: 2009-04-14
Classification: H02M

Abstract:
1. A switching circuit for regulating an output, comprising: a switch control circuit having a set input for supplying current to the output and a reset input for preventing supply of current to the output; a comparator having a first input for receiving an output voltage feedback signal, a second input for receiving an overshoot threshold signal established to limit voltage overshoot at the output of the switching circuit when load current is at a first level, and an output coupled to the reset input of the switch control circuit; the overshoot threshold signal being reduced when the load current is at a second level lower than the first level; the comparator being configured to output a reset signal supplied to the reset input when the signal at the first input exceeds the signal at the second input; and a differential amplifier having a first input coupled to a reference signal and a second input coupled to the output voltage feedback signal and an output that generates a signal proportional to output current.