The present disclosure relates to a voltage conversion circuit including: a plurality of switched capacitors; and a buck converter configured to be alternately applied with a first voltage and a second voltage output from each of two switched capacitors selected from the plurality of switched capacitors and to convert the applied first voltage or second voltage into an output voltage and to provide the output voltage. According to an embodiment, output terminals of each of the plurality of switched capacitors may be selectively electrically connected to an input terminal of the buck converter.