1. An electronic circuit comprising: a first voltage domain comprising a first set of processors operable to make respective voltage requests; a power management circuit having a first controllable supply voltage output coupled to said first set of processors and further having a first voting circuit responsive to the voltage requests of the first set of processors and operable to automatically establish a function of the respective voltage requests of the first set of processors to control the first controllable supply voltage output; and a second voltage domain comprising a second set of processors operable to make respective voltage requests; wherein said power management circuit has a second controllable supply voltage output coupled to said second set of processors and further having a second voting circuit responsive to the voltage requests of the second set of processors and operable to automatically establish a function of the respective voltage requests of the second set of processors to control the second controllable supply voltage output; wherein said power management circuit is operable for having the first controllable supply voltage output provide a voltage level different from a voltage level of the second controllable supply voltage output; and wherein each processor in said first set of processors has a respective state operable as an awake state or as a not-awake state, and said power management circuit is responsive to establish the highest of the respective voltage requests of the first set of processors that are in the awake state and for isolating from the first controllable supply voltage output any subset of said first set of processors having a not-awake state.