Circuit with voltage controlled oscillator (VCO) circuit and pulse-width modulated (PWM) signal generator, and method

A circuit comprising:

• a voltage-controlled oscillator (VCO) circuit comprising:
• a first node configured to receive a reference voltage;
• a second node configured to receive a feedback signal, which is a comparison signal, indicative of a variation of a regulated output voltage of an electronic voltage regulator with respect to the reference voltage;
• and
• a third node configured to provide a clock signal having a clock period based on the reference voltage and the comparison signal;
• and
• a pulse-width modulated (PWM) signal generator circuit comprising:
• a first node coupled to the VCO circuit and configured to receive the clock signal;
• a second node configured to receive an input signal proportional to an input voltage signal at an input node of the electronic voltage regulator;
• and
• a third node configured to provide at least one pulse-width modulation (PWM) drive signal to one or more electronic switches of a switching stage of the electronic voltage regulator based on the clock signal,
• wherein the input signal is proportional to the input voltage signal, and
• wherein the at least one PWM drive signal has a duty cycle that is inversely proportional to the comparison signal indicative of the variation of the regulated output voltage with respect to the reference voltage.