Implantable medical device having power supply for generating a regulated power supply

An implantable medical device having electronic circuitry operable to perform a therapeutic and/or monitoring function, comprising:

• a clock source for generating a clock signal;
• a power source;
• a plurality of capacitors dynamically configurable in a plurality of stacked configurations to generate a plurality of output voltages based on an input voltage from the power source, wherein each of the plurality of output voltages has a different supply ratio;
• a switch array having a plurality of switches operable in a number of different states coupled to the plurality of capacitors to configure the capacitors in the plurality of stacked configurations;
• and
• a switch controller that issues a control signal to the switch array to cause the plurality of the capacitors to alternate between the plurality of stacked configurations as a function of a first frequency, wherein the supply ratio of the plurality of output voltages is a function of the selected stacked configuration, wherein the switch controller issues the control signal to configure the plurality of capacitors in a stacked configuration selected from the plurality of stacked configurations and the alternating between each of the plurality of stacked configurations is synchronized with a clock edge.