LT1425, 5V/2A Telecommunications Supply
Reference design by: Analog Devices
Circuit shows LT1425, 5V/2A Telecommunications Supply. An external cascaded 200V MOSFET is used to extend the LT1425s 35V maximum switch voltage limit. The input voltage range (36V to 72V) also exceeds the LT1425s 20V maximum input voltage, so a bootstrap winding is used