Patent ID: 6046577
Filing Date: 2000-04-04
Classification: G05F

Abstract:
A low-dropout voltage regulator comprising:an error amplifier having first and second inputs and a reference output thereof, said first input for receiving an output of a bandgap circuit;an output switching device having first and second terminals and a control input thereof, said first terminal thereof being coupled to a first supply voltage input and said control input being coupled to receive a reference signal from said reference output of said error amplifier;first and second series coupled resistors coupling said second terminal of said output switching device to a second supply voltage input, said second terminal of said output switching device being coupled to provide a voltage output of said LDO voltage regulator and a node intermediate said first and second resistors being coupled to said second input of said error amplifier; anda transient boost circuit coupling said reference output of said error amplifier to said control input of said output switching device, said transient boost circuit operative to supply a transient current to said control terminal of said output switching device in response to a transient increase in the current load placed on said voltage output of said LDO voltage regulator.