Patent ID: 8552703
Filing Date: 2013-10-08
Classification: G05F,H02M,Y02B

Abstract:
1. A regulator controller which operates to control conversion of an input voltage to an output voltage, comprising: a switching regulator which receives a first signal indicative of a level of the output voltage and which develops a pulse control signal to regulate the output voltage when enabled; a low dropout regulator which receives said first signal and which operates to regulate the output voltage when enabled; and a mode controller which detects at least one load condition and which enables and disables said switching regulator and said low dropout regulator based on said at least one load condition, wherein said mode controller enables said switching regulator when operating in a normal mode and a dual mode, and wherein said mode controller enables said low dropout regulator in said dual mode and an LDO mode; and wherein said switching regulator regulates the output voltage to a first voltage level when enabled, wherein said low dropout regulator regulates the output voltage to a second voltage level when enabled in which said second voltage level is greater than said first voltage level, and wherein said low dropout regulator operates with foldback to enable regulating the output voltage at said first voltage level while said switching regulator and said low dropout regulator are both enabled.