Techniques to Reduce Charge Pump Overshoot
First Claim
1. A charge pump system for supplying an output voltage to a load, comprising:
- a charge pump connected to receive an input voltage generate therefrom the output voltage;
regulation circuitry connected to receive the output voltage and a reference voltage, the regulation circuitry connected to the charge pump to regulate the output voltage based upon the values of the reference voltage and the output voltage,wherein during a recovery operation, the output voltage is initially regulated according to a first level and subsequently regulated to a second level of greater amplitude than the first level, the second level corresponding to a desired regulated output voltage.
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Abstract
A charge pump system for supplying an output voltage to a load is described. The charge pump system includes a charge pump connected to receive an input voltage generate from it the output voltage. The system also includes regulation circuitry connected to receive the output voltage and a reference voltage, where the regulation circuitry is connected to the charge pump to regulate the output voltage based upon the values of the reference voltage and the output voltage. During ramp up or a recovery operation the output voltage is initially regulated according to a first level and subsequently regulated to a second level higher than the first level, the second level corresponding to a desired regulated output voltage.
152 Citations
19 Claims
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1. A charge pump system for supplying an output voltage to a load, comprising:
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a charge pump connected to receive an input voltage generate therefrom the output voltage; regulation circuitry connected to receive the output voltage and a reference voltage, the regulation circuitry connected to the charge pump to regulate the output voltage based upon the values of the reference voltage and the output voltage, wherein during a recovery operation, the output voltage is initially regulated according to a first level and subsequently regulated to a second level of greater amplitude than the first level, the second level corresponding to a desired regulated output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a charge pump system to provide an output voltage at an output, comprising:
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applying a load to the output; in response, operating the charge pump in a recovery phase, including; regulating the output voltage according to a first level; and subsequently regulating the output voltage according to a second level, the second level being of a greater amplitude than the first level; and subsequently supplying the load with the output regulated according to the second level. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification