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US 2004/0201369 A1Published application
Method of forming a low quiescent current voltage regulator and structure therefor
AssigneeSemiconductor Components Industries, LLC
InventorsStephane Perrier, Patrick Bernard, Pierre Daude
Life of this patent
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Abstract
A voltage regulator (10) is formed to generate a compensation current to flow when an output voltage of the voltage regulator (10) exceeds a compensation value. The compensation current is at least equal to the leakage current of the output transistor (24).
Claims20
A method of forming a voltage regulator comprising:
- forming the voltage regulator to provide an output voltage having a first value and a load current on a voltage output;
- and
- forming the voltage regulator to selectively generate a compensation current to flow from an output device of the voltage regulator to a voltage return of the voltage regulator when the output voltage of the voltage regulator exceeds a second value that is greater than the first value.
A method of forming a regulated voltage comprising:
- generating an output voltage that has a desired operating range between a first desired value and a second desired value that is less than the first desired value;
- disabling an output device when the output voltage reaches the first desired value;
- and
- selectively enabling a compensation current to flow from the output device to a voltage return when the output voltage exceeds a compensation value that is greater than the first desired value.
1 more element
A voltage regulator comprising:
- an output device coupled to receive an input voltage and form an output on an output of the voltage regulator;
- a feedback network coupled to form a feedback voltage that is representative of the output voltage;
- an error amplifier coupled to receive a first reference voltage and the first reference voltage and responsively drive the output device;
- and
- a compensation amplifier coupled to receive the feedback voltage and a second reference voltage that is greater than the first reference voltage and responsively generate a compensation current to flow from the output device.
2 more elements
Dependencies are inferred from the claim text.