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US 7,888,989 B2Granted
Charge pump regulator and method of producing a regulated voltage
AssigneeRichtek Technology Corporation
InventorsShui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
Life of this patent
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Abstract
A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
Claims11
A charge pump regulator for regulating a voltage on an output terminal, comprising:
- an input terminal for connecting with a power supply;
- a charge pump connected between the input terminal and the output terminal, for being operative to establish a charge path and a discharge path alternately;
- a feedback loop for producing an output-dependent feedback signal, charge pump having at least a current control element on the charge path or the discharge path for controlling a current flowing therethrough according to a drive signal derived from the output-dependent feedback signal;
- and
- a connector for connecting the drive signal to the current control element and disconnecting the drive signal from the current control element, the connector including:
- a transmission gate for connecting the drive signal to the current control element in a first phase;
- and
- a switch for connecting a voltage to turn off the current control element in a second phase, the voltage to turn off the current control element being the regulated voltage on the output terminal.
5 more elements
Dependencies are inferred from the claim text.