S. Muthukumar, M.C. John Wiselin, D. Kanchana, B.S. Sreeja, Design of DC-DC Power Converter Using Power Amplifier, International Journal of Electrical and Power Engineering, Volume 13,Issue 5, 2019, Pages 65-72, ISSN 1990-7958, ijepe.2019.65.72, (https://makhillpublications.co/view-article.php?doi=ijepe.2019.65.72) Abstract: In this study a DC-DC power converter design suitable for high frequency applications by using class E power amplifier (Inverter), instead of using small battery values choosing Radio Frequency (RF) values and getting high efficiency of output voltage and maximum of current and voltage values between 0-9 mW of power input in rectifier, the class E power amplifier designed by using GaN HEMT device and the power added efficiency of 64% after getting optimization of matching network and the gain is 14.4 dBm. Keywords: Class E power amplifier;power added efficiency;gain;output voltage;rectifier;high frequency applications