Abstract: A self-calibrating an auto-tracking voltage regulation method and system is provided that includes a superior voltage reference and a less stable operating voltage reference. The superior voltage reference may be a thermal resistor heated zener (TRZ) that is turned on only during a relatively low duty cycle sampling period. An error signal generator compares the superior voltage reference and a feedback voltage to generate an error signal based thereon. An error correction unit combines the error correction signal and the operating voltage reference to produce a calibrated output voltage that has a greater voltage stability than the operating voltage reference.