Patent ID: 9484809
Filing Date: 2016-11-01
CPC Classification: G11C,H02M

Claim Text:
1. An apparatus comprising: a supply node configured to receive an external supply voltage; a charge pump configured to convert the external supply voltage to a charge pump voltage; a circuit subsystem having a stage, wherein the stage is configured to receive the charge pump voltage at a stage supply node such that the charge pump provides a quiescent current to the stage, wherein the circuit subsystem is configured to provide an external output voltage at an external output node, wherein the circuit subsystem is configured to transition from a subsystem transient state to a subsystem steady state after the charge pump voltage is greater than a charge pump threshold value; and a charge pump regulation control module configured to select between coupling a state dependent reference having a transient state reference value that does not vary depending upon the external output voltage or coupling the state dependent reference having a steady state reference value and configured to regulate the charge pump voltage with respect to the state dependent reference, wherein the state dependent reference has the transient state reference value before the subsystem transitions to the subsystem steady state, and wherein the state dependent reference has the steady state reference value after the subsystem transitions to the subsystem steady state, and wherein the steady state reference value is provided by the external output voltage.