Voltage regulator with adaptive control

摘要

Generally, this disclosure describes an apparatus, systems and methods for adaptively controlling a voltage regulator. The apparatus may include a differencing circuit configured to generate an error signal based on a difference between a reference voltage and the output voltage of the voltage regulator; a proportional control circuit coupled to the differencing circuit, the proportional control circuit configured to generate a control signal proportional to the error signal; a derivative control circuit coupled to the differencing circuit, the derivative control circuit configured to generate a control signal based on the derivative of the error signal; a summer circuit coupled to the proportional control circuit and the derivative control circuit, the summer circuit configured to sum the proportional control signal and the derivative control signal; a PWM signal generator circuit coupled to the summer circuit, the PWM generator circuit configured to adjust the PWM modulation based on the summed control signal; and a state monitor circuit configured to monitor the state of the output voltage and perform a gain adjustment on the proportional control signal and the derivative control signal based on the monitored state.

主权项

1. A voltage regulator comprising:
a differencing circuit to generate an error signal based on a difference between a reference voltage and an output voltage of said voltage regulator; a proportional control circuit coupled to said differencing circuit, said proportional control circuit to generate a control signal proportional to said error signal; a derivative control circuit coupled to said differencing circuit, said derivative control circuit to generate a control signal based on a derivative of said error signal; a summer circuit coupled to said proportional control circuit and said derivative control circuit, said summer circuit to sum said proportional control signal and said derivative control signal; a pulse width modulated (PWM) signal generator circuit coupled to said summer circuit, said PWM generator circuit to adjust said PWM modulation based on said summed control signal; and a state monitor circuit to determine when said output voltage enters a steady state and to adjust a gain of said proportional control signal and said derivative control signal based on said determination, wherein said gain of said derivative control signal is decreased a predetermined programmable period of time after said state monitor circuit determines said output voltage entered said steady state.