Patent ID: 8378648
Filing Date: 2013-02-19
Classification: G05F

Abstract:
1. A power regulator control circuit having detection of a presence of an external pass device external to the power regulator control circuit, the power regulator control circuit comprising: an amplifier for regulating an output voltage, wherein the amplifier comprises an interstage amplifier; an internal pass device; a detection circuit for monitoring internally within the power regulator control circuit a signal magnitude of the amplifier and detecting a presence of the external pass device after a predetermined time after power up, wherein the detection circuit comprises a comparator for compairing the monitored signal magnitude of the amplifier on a inside connection of the power regulator control circuit and thereby monitors internally within the power regulator control circuit; and a switch operatively coupled to the detection circuit and the internal pass device for automatically disabling the internal pass device when the detection circuit detects the presence of the external pass device external to the power regulator control circuit, wherein the switch is operatively coupled to the interstage amplifier to enable the interstage amplifier in the presence of the external pass device and to disable the interstage amplifier in the absence of the external pass device.