A boost converter, comprising: a power stage circuit configured to generate an output voltage (V out) in response to a trigger signal; a comparator circuit, including a first input port and a second input port, the comparator circuit configured to compare a voltage applied to the first input port and the voltage applied to the second input port to generate said trigger signal by an output port; a reference voltage source configured to provide a reference voltage (V ref); a feedback circuit comprising a feedback divider configured to generate a feedback voltage signal (V FB) proportional to said output voltage (V out); an off-time timer configured to provide a voltage signal to form an off-time sawtooth voltage wave; an on-time timer configured to provide a voltage signal to form an on-time sawtooth voltage wave; a voltage loop circuit comprising said comparator circuit, the voltage loop circuit configured to couple the off-time sawtooth voltage and the reference voltage (V ref) to the first input port of the comparator circuit, and to couple the feedback voltage (V FB) and the on-time sawtooth voltage to the second input port of the comparator circuit; wherein the on-time sawtooth voltage and the off-time sawtooth voltage are active alternately; and wherein the slopes of the off-time sawtooth voltage and the on-time sawtooth voltage are proportional to the output voltage, the maximum value of the on-time sawtooth voltage is equal to the difference between the output voltage and an input voltage of the boost converter, and the maximum value of the off-time sawtooth voltage is equal to the input voltage, such that a combination of the off-time sawtooth voltage waveform and the on-time sawtooth voltage waveform provides a synthetic ripple voltage. a power stage circuit configured to generate an output voltage (V out) in response to a trigger signal; a comparator circuit, including a first input port and a second input port, the comparator circuit configured to compare a voltage applied to the first input port and the voltage applied to the second input port to generate said trigger signal by an output port; a reference voltage source configured to provide a reference voltage (V ref); a feedback circuit comprising a feedback divider configured to generate a feedback voltage signal (V FB) proportional to said output voltage (V out); an off-time timer configured to provide a voltage signal to form an off-time sawtooth voltage wave; an on-time timer configured to provide a voltage signal to form an on-time sawtooth voltage wave; a voltage loop circuit comprising said comparator circuit, the voltage loop circuit configured to couple the off-time sawtooth voltage and the reference voltage (V ref) to the first input port of the comparator circuit, and to couple the feedback voltage (V FB) and the on-time sawtooth voltage to the second input port of the comparator circuit; wherein the on-time sawtooth voltage and the off-time sawtooth voltage are active alternately; and wherein the slopes of the off-time sawtooth voltage and the on-time sawtooth voltage are proportional to the output voltage, the maximum value of the on-time sawtooth voltage is equal to the difference between the output voltage and an input voltage of the boost converter, and the maximum value of the off-time sawtooth voltage is equal to the input voltage, such that a combination of the off-time sawtooth voltage waveform and the on-time sawtooth voltage waveform provides a synthetic ripple voltage.