In recent years DC-DC converters have found wide applications in industry which have taken a special place with the expansion of the use of renewable energy sources. DC-DC converters with step-down/stepup voltage are required in many applications like electronic products, fuel cell systems, battery powered systems, portable devices, light emitting diode (LED) and electric vehicle. Therefore converters with high voltage con-version ratio, high efficiency, low cost and small size are needed. A switched inductor based converter achieves, high voltage ratio for applications that needs of high voltage, improves the effi-ciency and reduces voltage stress. The Switched Inductor based Transformerless Buck-Boost converter has continuous input and output current. The output voltage ripple of this converter is low and the voltage stress across switch and diodes are slight and lower than the converters output voltage. Results are obtained by simulating the converter in MATLAB/ SIMULINK R2021b. The simulation results shows that the Switched Inductor based Transformerless Buck-Boost converter has high voltage gain and achieves a peak efficiency

Keywords : Buck-Boost Converter, Transformerless, Gain, Efficiency, Switched inductor