A battery driven power supply apparatus comprising: - a dynamic voltage control circuit in communication with external control circuitry to receive power level commands instructing the battery driven power supply apparatus to modify an output voltage level (Vout) of the battery driven power supply apparatus to minimize energy usage from a battery ; characterized in that it further comprises: - a low dropout voltage regulation circuit in communication with the dynamic voltage control circuit to receive voltage level modification signals developed by the dynamic voltage control circuit from the power level commands for dynamically adjusting the output voltage level (Vout) based on the voltage level modifying signals, the low dropout voltage regulation circuit comprising: an adjustable internal current source connected to the output terminal ( Vout ) of the low dropout voltage regulation circuit to provide a current for increasing a pole of the output of the low dropout voltage regulation circuit , and a current sense circuit adapted to sense an output current passing through the low dropout voltage regulation circuit to increase an internal pole of the low dropout voltage regulation circuit to permit rapid changes in the output voltage ( Vout ) with changes to the voltage level modification signals; and - a switching voltage regulator having an input connected to the battery and an output connected to the low dropout voltage regulation circuit to provide a pre-regulated input voltage (Vin) for generation of the output voltage level (Vout). - a dynamic voltage control circuit in communication with external control circuitry to receive power level commands instructing the battery driven power supply apparatus to modify an output voltage level (Vout) of the battery driven power supply apparatus to minimize energy usage from a battery ; - a low dropout voltage regulation circuit in communication with the dynamic voltage control circuit to receive voltage level modification signals developed by the dynamic voltage control circuit from the power level commands for dynamically adjusting the output voltage level (Vout) based on the voltage level modifying signals, the low dropout voltage regulation circuit comprising: an adjustable internal current source connected to the output terminal ( Vout ) of the low dropout voltage regulation circuit to provide a current for increasing a pole of the output of the low dropout voltage regulation circuit , and a current sense circuit adapted to sense an output current passing through the low dropout voltage regulation circuit to increase an internal pole of the low dropout voltage regulation circuit to permit rapid changes in the output voltage ( Vout ) with changes to the voltage level modification signals; and an adjustable internal current source connected to the output terminal ( Vout ) of the low dropout voltage regulation circuit to provide a current for increasing a pole of the output of the low dropout voltage regulation circuit , and a current sense circuit adapted to sense an output current passing through the low dropout voltage regulation circuit to increase an internal pole of the low dropout voltage regulation circuit to permit rapid changes in the output voltage ( Vout ) with changes to the voltage level modification signals; and - a switching voltage regulator having an input connected to the battery and an output connected to the low dropout voltage regulation circuit to provide a pre-regulated input voltage (Vin) for generation of the output voltage level (Vout). <EOS>