Patent attributes
A multi-level charge pump (MCP) circuit is provided. The MCP circuit includes a multi-level voltage circuit configured to receive a supply voltage and generate a low-frequency voltage. The multi-level voltage circuit includes a first switch path, a second switch path, and a third switch path each having a respective on-resistance and coupled in parallel between an input node and an output node. In a non-limiting example, the multi-level voltage circuit is configured to activate the first switch path and at least one of the second switch path and the third switch path when the multi-level voltage circuit generates the low-frequency voltage that equals the supply voltage. By activating at least two of the three switch paths to generate the low-frequency voltage, it may be possible to reduce an equivalent resistance of the multi-level voltage circuit, thus helping to improve efficiency and reduce power loss of the MCP circuit.
