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Schottky diodes use a metal-semiconductor junction as opposed to the semiconductor-semiconductor junctions used in standard diodes. This configuration allows for lower forward bias voltage drops (0.15V - 0.45V vs. 0.5-0.7V) and faster switching times, making them ideal for power supply switching operations. Drawbacks for schottky diodes include much higher reverse bias leakage current ratings. Because p-n recombination is not a factor in switching delay time, only capacitance affects the reverse switching time.
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