A second FET switch, operating out of phase with the first switch, allows {HEAD ~ the storage capacitor} to discharge through an inductor back to {TAIL ~ the unregulated input source} 
to discharge back to
A second FET switch , operating out of phase with the first switch , allows { HEAD ~ the storage capacitor } to discharge through an inductor back to { TAIL ~ the unregulated input source }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL