Patent ID: 9252660
Filing Date: 2016-02-02
CPC Classification: H02M,H03F

Claim Text:
1. A voltage regulator circuit, comprising: an array of charge pumps each having an output coupled to a common output node; a comparator having first and second inputs; a controller having an input coupled to an output of the comparator and having an output for a selection signal being input to the array of charge pumps, the selection signal determines a number of charge pumps to be activated; and a voltage divider network comprising: a pair of voltage dividers comprising a first voltage divider and a second voltage divider, each of the first and second voltage dividers having an intermediate node thereof coupled to a respective input of the comparator; a first switch network that connects the first voltage divider to ground and to the common output node in a first phase of operation, and the first switch network further connects to a supply voltage and to a reference voltage in a second phase of operation; and a second switch network that connects the second voltage divider to the reference voltage and to the supply voltage in both of the first and second phases of operation, wherein the comparator compares an average of the reference voltage and the supply voltage against an average of an output voltage and ground.