Asynchronous boost converters require a Schottky diode as the rectifying element due to the diode's low
forward voltage and fast turn-on time. Because of these characteristics asynchronous boost converters
can have as good as, or better efficiency, than synchronous boost converters. This is especially true when
the boost conversion ratios (VOUT/VIN) are high, and the Schottky diode conduction time is low.