An　integrated　planar　inductor　based　on　a　novel　eight-column　magnetic　core　is　proposed　in　this　paper,　which　can　effectively　reduce　the　magnetic　size　and　improve　the　power　density　while　maintaining　a　large　inductance　value　compared　with　conventional　magnetic　core.　In　addition,　this　novel　structure　requires　fewer　PCB　layers　at　the　same　inductance　value　compared　with　EI　or　EE　core,　which　is　beneficial　to　reduce　the　PCB　cost.　The　magnetic　reluctance　model　is　established　to　guide　designs.　Meanwhile,　the　magnetic　and　current　density　distribution　simulation　is　implemented　by　Maxwell　3D　software.　Finally,　a　12-6V,　30W　buck　prototype　is　built　to　verify　the　performance　of　the　designed　integrated　planar　inductor.　©　2021　IEEE.