Reference-following voltage converter

A method of operation within voltage conversion circuit, the method comprising:

• receiving, at a first input, a supply voltage from a power supply component;
• receiving, at a second input, a reference voltage from the power supply component, the supply voltage being higher than the reference voltage by a scaling factor of at least five;
• and
• iteratively charging a filter capacitor to produce a converted voltage that follows the reference voltage, including switchably coupling the first input to the filter capacitor while the converted voltage is less than the reference voltage to raise the converted voltage, and switchably decoupling the first input from the filter capacitor while the converted voltage exceeds the reference voltage to enable the converted voltage to decay.

A voltage converter comprising:

• a first input to receive a supply voltage from a power supply component;
• a second input to receive a reference voltage from the power supply component, the supply voltage being higher than the reference voltage by a scaling factor of at least five;
• a filter capacitor;
• and
• means for iteratively charging a filter capacitor to produce a converted voltage that follows the reference voltage, including (i) means for switchably coupling the first input to the filter capacitor while the converted voltage is less than the reference voltage to raise the converted voltage, and (ii) means for switchably decoupling the first input from the filter capacitor while the converted voltage exceeds the reference voltage to enable the converted voltage to decay.