A　DC-DC　converter　with　high　boost　and　low　switching　voltage　stress　is　proposed　by　combining　switched　capacitor　(SC)　and　coupled　inductor　(CL)　techniques　based　on　a　conventional　boost　circuit.　The　design　methodology　of　this　converter　includes　substituting　SC　for　a　single　switch　in　the　boost　converter,　combining　CL,　and　integrating　a　resonant　boost　circuit　for　absorbing　leakage　inductance.　The　improved　power　switch　topology　in　this　design　has　lower　voltage　stress,　lower　diode　current　stress,　fewer　total　components,　and　common　ground　than　other　conventional　DC-DC　converters.　The　operating　modes　and　steady　state　analysis　of　the　converter　are　provided　in　terms　of　leakage　inductance　utilization,　with　component　stress　derivation　and　theoretical　efficiency　analysis.　In　addition,　comparisons　with　other　dc-dc　converters　are　made.　Subsequently,　experiments　were　conducted　on　a　200　W　DC-DC　converter　prototype　to　verify　the　reliability　of　the　converter.　The　presence　of　leakage　inductance　leads　to　voltage　spikes　in　the　switch　and　resource　loss　in　the　drive　duty　cycle,　both　of　which　are　difficult　to　fully　balance.　In　order　to　solve　these　problems,　a　switched-capacitor　structure　is　used　to　replace　the　excitation　switch　of　a　conventional　boost　circuit.　Experimental　results　demonstrate　that　the　efficiency　of　the　prototype　is　stabilized　at　over　94%　in　the　laboratory　state.　image