Abstract. The many uses of DC power systems such as photovoltaic (PV) systems require a system that can convert the DC power, namely a DC-DC converter. Buck-boost converter as a type of DC-DC converter has a function to increase or decrease the voltage, but the conversion result is still unstable, so a control system is needed. In this study, a converter topology will be proposed which is capable of producing a high output voltage gain and will be compared with conventional buck-boost converters. The parameters to be compared are the voltage gain, the components of the two converters, and the voltage stress on the switch and diode. The parameters specified in the proposed converter topology are frequency with a value of 33 kHz, duty cycle buck at 22% and for boost at 60%, while the conventional buck-boost converter is given a frequency with a value of 30 kHz, duty cycle buck at 20% and for boost at 66%. The input voltage in the proposed converter topology varies at 12 V and 22 V, while for the conventional buck-boost converter at 25 V. The test results show that the proposed converter when compared to conventional buck-boost converters has a voltage gain that is up to three times higher, has a maximum difference voltage stress ratio of 6% on the switch and diode components during simulation with manual calculations on the proposed converter, and has a non-inverting output for the proposed converter whereas a conventional buck-boost converter has an inverting output.