Low drop-out DC voltage regulator

Details Low drop-out DC voltage regulator Low drop-out DC voltage regulator

2005-03-15

2008-10-07

Nguyen, Matthew V (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S281000

Reexamination Certificate

active

07432693

ABSTRACT:
A low drop-out DC voltage regulator for regulating a voltage from a DC power supply applied to a load at an output of the regulator and comprising a pass device for controlling flow of current from the power supply to the load so as to control the output voltage at the regulator output, and a feedback loop for controlling the pass device. The feedback loop comprises a resistive feedback path and a capacitive feedback path that includes a feedback capacitive element in series, and comparator means responsive to signals from the feedback paths for applying to the pass device an error signal that is a function of the value of the output voltage relative to a nominal value so as to control the output voltage. The comparator means comprises feedback current producing means for maintaining a common point of the resistive feedback path and the capacitive feedback path at a reference voltage so as to produce a feedback current flowing in the resistive feedback path and in the capacitive feedback path in parallel between the regulator output and the common point, and current comparison means responsive to relative values of the feedback current and of a reference current for producing the error signal.

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