A flying capacitor converter configured to receive a DC input voltage (Vdc) and convert the DC input voltage (Vdc) into a DC output voltage, wherein the flying capacitor converter comprises: an inductor coupled between a positive end of the DC input voltage (Vdc) and a first node (P L), a first switch and a second switch commonly coupled to a second node (Ps), and the first switch coupled to the first node (P L) and the second switch coupled to a negative end of the DC input voltage (Vdc), a cathode of a first diode and an anode of a second diode commonly coupled to a third node (P D), and an anode of the first diode coupled to the first node (P L), a first capacitor (C B1) and a second capacitor (C B2) commonly coupled to a fourth node (Pc), and the first capacitor (C B1) coupled to a cathode of the second diode and the second capacitor (C B2) coupled to the second switch and the negative end of the DC input voltage (Vdc), wherein the first capacitor (C B1) and the second capacitor (C B2) are configured to provide the DC output voltage, and the fourth node (Pc) is a midpoint of the DC output voltage, a flying capacitor (C F1) coupled to the second node (Ps) and the third node (P D), a cathode of a third diode (Dei) and a third capacitor (Cc) commonly coupled to a fifth node (P E), and an anode of the third diode (Dei) coupled to the second node (Ps) and the third capacitor (Cc) coupled to the second switch and the negative end of the DC input voltage (Vdc), a cathode of a fourth diode (D C2) coupled to the cathode of the second diode and an anode of the fourth diode (D C2) coupled to the fifth node (P E), an anode of a fifth diode (D C3) coupled to the fourth node (Pc), and a voltage suppressor coupled in series to the fifth diode (D C3) and the voltage suppressor and the fifth diode (D C3) coupled between the third node (P D) and the fourth node (Pc), and a first resistor coupled between a sixth node (P A) and a seventh node, wherein the seventh node is a common node of the second diode and the fourth diode (D C2), wherein a breakdown voltage of the voltage suppressor is greater than a difference between a maximum ripple voltage of the second capacitor (C B2) and a minimum ripple voltage of the flying capacitor (C F1), wherein the voltage suppressor and the fifth diode (D C3) are commonly coupled to the sixth node (P A), a second end of the voltage suppressor is coupled to the third node (P D) and a first end of the voltage suppressor is coupled to a cathode of the fifth diode (D C3). an inductor coupled between a positive end of the DC input voltage (Vdc) and a first node (P L), a first switch and a second switch commonly coupled to a second node (Ps), and the first switch coupled to the first node (P L) and the second switch coupled to a negative end of the DC input voltage (Vdc), a cathode of a first diode and an anode of a second diode commonly coupled to a third node (P D), and an anode of the first diode coupled to the first node (P L), a first capacitor (C B1) and a second capacitor (C B2) commonly coupled to a fourth node (Pc), and the first capacitor (C B1) coupled to a cathode of the second diode and the second capacitor (C B2) coupled to the second switch and the negative end of the DC input voltage (Vdc), wherein the first capacitor (C B1) and the second capacitor (C B2) are configured to provide the DC output voltage, and the fourth node (Pc) is a midpoint of the DC output voltage, a flying capacitor (C F1) coupled to the second node (Ps) and the third node (P D), a cathode of a third diode (Dei) and a third capacitor (Cc) commonly coupled to a fifth node (P E), and an anode of the third diode (Dei) coupled to the second node (Ps) and the third capacitor (Cc) coupled to the second switch and the negative end of the DC input voltage (Vdc), a cathode of a fourth diode (D C2) coupled to the cathode of the second diode and an anode of the fourth diode (D C2) coupled to the fifth node (P E), an anode of a fifth diode (D C3) coupled to the fourth node (Pc), and a voltage suppressor coupled in series to the fifth diode (D C3) and the voltage suppressor and the fifth diode (D C3) coupled between the third node (P D) and the fourth node (Pc), and a first resistor coupled between a sixth node (P A) and a seventh node, wherein the seventh node is a common node of the second diode and the fourth diode (D C2), wherein a breakdown voltage of the voltage suppressor is greater than a difference between a maximum ripple voltage of the second capacitor (C B2) and a minimum ripple voltage of the flying capacitor (C F1), wherein the voltage suppressor and the fifth diode (D C3) are commonly coupled to the sixth node (P A), a second end of the voltage suppressor is coupled to the third node (P D) and a first end of the voltage suppressor is coupled to a cathode of the fifth diode (D C3).