Patent ID: 6636023
Filing Date: 2003-10-21
Classification: G05F

Abstract:
A voltage regulator having a regulator output at a predetermined output voltage level comprising:a switching regulator having a first regulated output providing a first output voltage level, where the first output voltage level is approximately equal to the predetermined output voltage level, the first regulated output being coupled to the regulator output; a linear regulator having a second regulated output providing a second output voltage level where the second output voltage level is less than the first output voltage level, the second regulated output being coupled to the first regulated output such that the voltage at the regulator output is maintained at approximately the predetermined output voltage level by operation of the switching regulator until the regulator output falls below the second output voltage level at which time the regulator output is maintained at approximately the predetermined output voltage level by operation of the linear regulator, wherein the second output voltage level is approximately 1.5% less than the first output voltage level.