Patent ID: 6404290
Filing Date: 2002-06-11
Classification: H02M

Abstract:
A regulator circuit for providing a regulated voltage, comprising:a driver for generating a drive signal; a charge pump having a first voltage input coupled to a first voltage source, being responsive to the drive signal, to generate a pump voltage from the first voltage source; an amplifier having a reference input coupled to a reference voltage, a sense input coupled to a sense signal representative of the pump voltage, and an output, operable in response to a difference between the reference voltage and the sense signal, to control the driver; and a switch being coupled from the amplifier output to an output of the charge pump such that the pump voltage is controllably boosted by the amplifier output through the switch, wherein the charge pump further includes a mode control input, operable in response to a mode control signal, to select an operating mode of the charge pump, the operating mode being selected from the group of normal charge rate and fast charge rate.