Multiple output charge pump with multiple flying capacitors
First Claim
1. A multiple output charge pump comprising:
- a first flying capacitor;
a second flying capacitor;
a first output node to provide a first voltage;
a second output node, distinct from the first output node, to provide a second voltage different than the first voltage; and
a switching network configured to provide a first mode of operation in which the first and second flying capacitors are connected in one of in series with one another between an input voltage and ground or in parallel with one another between the input voltage and ground, a second mode of operation in which the first and second flying capacitors are connected in parallel with one another between ground and the second output node, and a third mode of operation.
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Abstract
A multiple output charge pump that includes a first flying capacitor, a second flying capacitor, a first output node, a second output node, and a switching network. The first output node is configured to provide a first voltage, and the second output node is distinct from the first output node and is configured to provide a second voltage, different than the first voltage. The switching network is configured to provide a first mode of operation in which the first and second flying capacitors are connected in one of in series with one another between an input voltage and ground or in parallel with one another between the input voltage and ground, a second mode of operation in which the first and second flying capacitors are connected in parallel with one another between ground and the second output node, and a third mode of operation.
54 Citations
22 Claims
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1. A multiple output charge pump comprising:
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a first flying capacitor; a second flying capacitor; a first output node to provide a first voltage; a second output node, distinct from the first output node, to provide a second voltage different than the first voltage; and a switching network configured to provide a first mode of operation in which the first and second flying capacitors are connected in one of in series with one another between an input voltage and ground or in parallel with one another between the input voltage and ground, a second mode of operation in which the first and second flying capacitors are connected in parallel with one another between ground and the second output node, and a third mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of operating a multiple output charge pump that includes a first flying capacitor, a second flying capacitor, a first output, a second output, and a switching network, the method comprising:
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configuring the switching network to operate the charge pump in a first mode in which the first and second flying capacitors are connected in one of in series with one another between and input voltage and ground or in parallel with one another between the input voltage and ground; configuring the switching network to operate the charge pump in a second mode in which the first and second flying capacitors are connected in parallel with one another between ground and one of the first output and the second output; and configuring the switching network to operate the charge pump in a third mode in which the first and second flying capacitors are connected in one of in parallel with one another between the input voltage and the other of the first output and the second output or in series with one another between ground and the other of the first output and the second output.
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Specification