Analog supply generation using low-voltage digital supply

A method, comprising:

• generating, using a voltage of an input power supply node and a clock signal, a first voltage on a first power supply node;
• adjusting a conductance between the first power supply node and a second power supply node using a control signal;
• generating a particular voltage on a regulated power supply node using a second voltage on the second power supply node and the clock signal;
• and
• generating the control signal using results of comparing a voltage of the regulated power supply node and a reference voltage.

An apparatus, comprising:

• a first pump circuit including a first pair of charge pump circuits and a first device, wherein the first pump circuit is coupled to an input power supply node, wherein the first device is configured to adjust a first conductance between the first pair of charge pump circuits using a first control signal, and wherein the first pump circuit is configured to generate, using the first control signal and a plurality of clock signals, a first voltage level on an intermediate supply node, wherein the first voltage level is greater than a voltage level of the input power supply node;
• and
• a second pump circuit including a second pair of charge pump circuits and a second devices, wherein the second pump circuit is coupled to the intermediate supply node, wherein the second device is configured to adjust a second conductance between the second pair of charge pump circuits using a second control signal, and wherein the second pump circuit is configured to generate, using the second control signal and the plurality of clock signals, a second voltage level on a regulated power supply node, and wherein the second voltage level is greater than the first voltage level;
• and
• a control circuit configured to:
• generate the plurality of clock signals;
• generate the first control signal using a voltage level of the intermediate supply node;
• and
• generate the second control signal using a voltage level of the regulated power supply node.