Adjustable voltage regulator circuitry

An adjustable voltage regulator circuit, comprising:

• a voltage conversion circuit, receiving an input voltage to generate an output voltage in a first clock cycle;
• a voltage conversion controller, detecting the output voltage, comparing the output voltage with at least one reference voltage value, and outputting an enable signal based on a comparison result to control the voltage conversion circuit to adjust the output voltage;
• and
• a clock generator, generating at least one first clock signal and at least one second clock signal to respectively drive the voltage conversion circuit and the voltage conversion controller,
• wherein the voltage conversion controller adjusts the enable signal to gradually restore the output voltage to a predetermined voltage range,
• wherein the voltage conversion controller gradually adjusts the output voltage based on a feedback voltage generated by the voltage conversion circuit in a second clock cycle,
• wherein the voltage conversion controller continuously detects the output voltage and the feedback voltage of the voltage conversion circuit from the first clock cycle to the second clock cycle, and adjusts a switching frequency of the voltage conversion circuit based on the feedback voltage of the voltage conversion circuit,
• wherein the voltage conversion controller controls the enable signal to adjust the switching frequency of the voltage conversion circuit based on a gradual adjustment algorithm,
• wherein the voltage conversion controller determines a plurality of reference voltage values based on a gradual shift algorithm, and the reference voltage values comprise:
• a first reference voltage value;
• a second reference voltage value, wherein the predetermined voltage range is between the first reference voltage value and the second reference voltage value;
• and
• a third reference voltage value, wherein a region between the second reference voltage value and the third reference voltage value is a first search region, a region lower than the third reference voltage value is a second search region, and a region higher than the first reference voltage value is a third search region, wherein a search rate used by the voltage conversion controller in the first search region is different from a search rate used in the second search region.