Increasing　switching　frequency　can　greatly　improve　power　density　of　dc-dc　power　converter,　while　meets　challenges　of　significant　high-frequency　dc　output　ripple.　The　capacitor　filter　is　a　most　cost-effective　suppression　for　the　output　ripple.　However,　the　capacitor　parasitic　parameters　will　deteriorate　the　suppression.　The　frequency　characteristic　of　the　capacitor　filter　was　analyzed　by　considering　the　parasitic　parameters.　Then,　a　novel　parallel　dual　capacitors　filer　is　proposed,　which　creates　the　reverse　coupling　between　the　two　adjacent　capacitors　of　the　filter　by　constructing　opposite　current　flowing　through　the　capacitors.　Using　the　novel　dual　capacitors　filer　as　a　cell,　a　novel　compact　multicapacitors　filer　of　V-shape　is　further　extended.　The　insert　gain　test　and　the　prototype　with　20　MHz　of　switching　frequency　are　constructed,　and　the　experiments　verified　that　the　novel　filters　suppress　the　ripple　by　maximum　about　50%　comparing　with　the　traditional　capacitor　without　adding　volume　and　cost.　©　1986-2012　IEEE.