Power converter of modulating reference voltage based on output voltage

A power converter of modulating a reference voltage based on an output voltage, comprising:

• a high-side switch, wherein a first terminal of the high-side switch is coupled to an input voltage;
• a low-side switch, wherein a first terminal of the low-side switch is connected to a second terminal of the high-side switch and a first terminal of an inductor, and a second terminal of the low-side switch is grounded;
• a comparator, wherein a first input terminal of the comparator is connected to a second terminal of the inductor;
• a reference voltage generating circuit, wherein the reference voltage generating circuit is connected to the second terminal of the inductor and a second input terminal of the comparator, and configured to output a variable reference voltage to the second input terminal of the comparator according to an output voltage of the second terminal of the inductor;
• and
• a switching circuit, wherein the switching circuit is connected to a control terminal of the high-side switch, a control terminal of the low-side switch and an output terminal of the comparator, and configured to control the high-side switch and the low-side switch according to a comparing signal from the output terminal of the comparator.