A voltage positioning technique allows a power supply controller to more fully exploit active voltage positioning as a way of maintaining supply voltage within the limits defined for an associated electrical load. The supply voltage is allowed to "droop" as a function of load current. Droop may be implemented in linear proportion to load current, or as a discrete droop function once load current exceeds a given threshold. In either case, the droop circuitry of the supply controller implements a bounding function that establishes an accurately known maximum droop voltage magnitude. This maximum droop voltage limit establishes a reliable lower limit for the supply voltage independent of increasing load current. This accurately set lower bound for the droop voltage enables the controller to more aggressively position the supply voltage at the lower voltage limit of the load, which minimizes voltage overshoot and load power consumption.

In order to improve drive performance of a voltage regulator (on resistance of an output transistor) while suppressing increases in surface area resistance of an output transistor is reduced by changing the threshold voltage of the output transistor by controlling the back-gate voltages of output transistors of a voltage regulators.

In order to improve drive performance of a voltage regulator (on resistance of an output transistor) while suppressing increases in surface area resistance of an output transistor is reduced by changing the threshold voltage of the output transistor by controlling the back-gate voltages of output transistors of a voltage regulators.