A　novel　passive　lossless　snubber　method　called　charge-pump　snubber　(CPS),　which　can　improve　commutating　of　the　switching　devices　and　regenerating　of　the　switching　transient　energy,　is　proposed.　The　new　snubber　is　comprised　of　an　additional　low　power　auxiliary　winding　magnetically　coupled　with　the　main　inductor,　a　small　inductor,　two　low　power　diodes,　and　two　small　capacitors.　It　can　regenerate　energy　captured　in　the　snubber　capacitor　fully　and　directly.　It　not　only　snubs　the　switching　devices　effectively,　but　also　has　a　few　good　features　such　as　wider　soft-switching　range,　lower　voltage　stress,　simple　to　design,　lower　cost　and　so　on.　To　be　a　demonstration,　operation　principle,　theoretical　analyses,　relevant　equations,　simulative　results,　as　well　as　experimental　testing　results　of　a　typical　PWM　boost　converter　equipped　with　proposed　CPS　are　shown.　All　are　verified　that　the　technology　is　well　applicable　to　any　non-isolated　DC-DC　converters,　especially　for　those　want　to　operate　under　the　conditions　of　very　wider　ranges　of　input　voltage　and/or　load　current,　which　still　hold　soft-switching　operation.