CURRENT PULSE COUNT CONTROL IN A VOLTAGE REGULATOR

摘要

A method of regulating voltage with a switching regulator is disclosed. The method includes sensing an output voltage provided by the regulator. If the output voltage drops below a low voltage threshold, a burst of one or more current pulses is provided. If the output voltage raises above a high voltage threshold during the burst, discontinuing the burst of current pulses. The method includes counting a number of the one or more current pulses in the burst, and comparing the number of the one or more current pulses with at least one pulse threshold. The upper current threshold is adjusted based on the number of the one or more current pulses.

主权项

1. A method of regulating voltage with a switching regulator, the method comprising:
sensing an output voltage provided by the regulator; if the output voltage drops below a low voltage threshold, providing a burst of one or more current pulses to raise the output voltage, wherein providing each current pulse in the burst includes:
setting the voltage regulator to a charge state; andif a current through an inductor reaches an upper current threshold while the regulator is in the charge state, switching the regulator from the charge state to a discharge state; if the output voltage raises above a high voltage threshold during the burst, discontinuing the burst of current pulses; counting a number of the one or more current pulses in the burst; comparing the number of the one or more current pulses with at least one pulse threshold; and adjusting the upper current threshold based on the number of the one or more current pulses.