It provides {HEAD ~ all DC} to {TAIL ~ DC conversion and power regulation functions} with a minimum of external components 
to
It provides { HEAD ~ all DC } to { TAIL ~ DC conversion and power regulation functions } with a minimum of external components
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH