Method and system for boosting output current

A method of operating a device including an energy storage device, a voltage regulator coupled to the energy storage device and being configured to provide regulated power having a set output regulated voltage level, and bias circuitry coupled to the voltage regulator and including a bias-boosting metal-oxide semiconductor field-effect transistor (MOSFET), the method comprising:

• providing first power having a first voltage level from the energy storage device to the voltage regulator;
• regulating, by the voltage regulator, the first power to generate first regulated power;
• providing the first regulated power from the voltage regulator to the bias circuitry;
• activating the bias-boosting MOSFET responsive to the first voltage level being less than the set output regulated voltage level, the activating including operating the bias-boosting MOSFET in a triode region;
• and
• outputting, by the bias circuitry, a boosted bias current responsive to activating the bias-boosting MOSFET.

A biasing system comprising:

• an input to receive a supply voltage having a first voltage level;
• an output branch having an output to provide a bias current to a load;
• and
• a feedback branch including a bias-boosting metal-oxide semiconductor field-effect transistor (MOSFET) configured to be in an active mode responsive to the first voltage level being below a set voltage threshold level and to be in an inactive mode responsive to the first voltage level being above the set voltage threshold level, the bias-boosting MOSFET being in a triode region in the active mode and in a subthreshold region in the inactive mode.

A method of operating a device including an energy storage device, a voltage regulator coupled to the energy storage device and being configured to provide regulated power having a set output regulated voltage level, and bias circuitry coupled to the voltage regulator and including a first voltage-controlled switch, a second voltage-controlled switch, and an error amplifier having a first input to receive a reference voltage, a second input to receive a feedback voltage, and an output to provide an output signal, the method comprising:

• providing first power having a first voltage level from the energy storage device to the voltage regulator;
• regulating, by the voltage regulator, the first power to generate first regulated power;
• providing the first regulated power from the voltage regulator to the bias circuitry;
• activating the first voltage-controlled switch responsive to the first voltage level being less than the set output regulated voltage level;
• outputting, by the bias circuitry, a boosted bias current responsive to activating the bias-boosting component;
• providing second power having a second voltage level from the energy storage device to the voltage regulator;
• regulating, by the voltage regulator, the second power to generate second regulated power;
• providing the second regulated power from the voltage regulator to the bias circuitry;
• deactivating the first voltage-controlled switch responsive to the second voltage level being at or above the set output regulated voltage level;
• outputting, by the bias circuitry, a non-boosted bias current responsive to deactivating the first voltage-controlled switch;
• and
• providing the output signal to a control connection of the at least one second voltage-controlled switch to control one of the boosted bias current or the non-boosted bias current.