Control circuit of switching regulator circuit and method for controlling switching regulator circuit

Abstract

A control circuit of a switching regulator circuit includes a reference signal generation circuit, an oscillator circuit, a feedback circuit, a combining circuit, a comparator circuit, and a PWM control circuit. The reference signal generation circuit generates an adjusted reference voltage according to a first reference voltage and a PWM signal. The oscillator circuit generates a sawtooth wave signal and a clock signal. The feedback circuit generates a feedback voltage according to an output voltage. The combining circuit combines the adjusted reference voltage and the sawtooth wave signal to generate an adjusted sawtooth wave signal. The comparator circuit compares input signals derived from the feedback voltage and the adjusted sawtooth wave signal, to output a comparison signal. The PWM control circuit generates the PWM signal according to the comparison signal and the clock signal.

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