A Schottky diode must be used for the boost output diode. Current rating must be at least 25% higher than the maximum output current. Schottky diodes with a low forward drop and fast switching speeds are ideal for increasing efficiency. At maximum current, the forward voltage must be as low as possible; less than 0.5V is recommended. Reverse breakdown voltage of the Schottky diode must be significantly larger than the output voltage, 25% higher voltage rating is recommended. Do not use ordinary rectifier diodes, because slow switching speeds and long recovery times cause efficiency and load regulation to suffer.