Patent ID: 8417984

Claim:
A system comprising: a System-on-Chip (SoC) comprising a microcontroller operating in response to a power supply voltage and generating a target voltage, and a plurality of application circuits commonly integrated with the microcontroller on a semiconductor chip, the plurality of application circuits being physically separate from the microcontroller as integrated on the semiconductor chip and being selectively activated by the microcontroller; and a power control circuit configured to generate the power supply voltage in response to the target voltage, wherein the target voltage varies according to a number of the plurality of application activated at a same time by the microcontroller, wherein the microcontroller varies the target voltage according to a load current estimate for the semiconductor chip relative to different combinations of activated ones of the plurality of application circuits, wherein the microcontroller varies the target voltage according to a load current estimate for the semiconductor chip relative to different combinations of activated ones of the plurality of application circuits, and wherein the microcontroller is configured to retrieve a load current estimate from the lookup table, and generate the target voltage in response to the retrieved load current estimate.