Patent ID: 6819165
Filing Date: 2004-11-16
Classification: G05F,H02M,Y02B

Abstract:
A voltage regulator with dynamically boosted bias current comprising:a pass device for providing current to a load; an error circuit responsive to a difference between a predetermined reference voltage and a function of the voltage on the load, to produce an error signal; and a driver circuit, responsive to said error signal, for controlling said pass device to adjust the current to the load to reduce the error signal; said driver circuit including an amplifier responsive to said error signal for controlling said pass device; a bias current source for biasing said amplifier; a sensing circuit for sensing a portion of said error signal; a reference current source for providing a reference current; a second error circuit responsive to a difference between said portion of said error signal and said reference current to produce a second error signal; and a boost circuit responsive to said second error signal to increase the bias current provided to said amplifier when the load demands more current.