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