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Synchronous step-down DC/DC
Diode (Schottky rectifier) :IF < 250 mA MOSFET - 30 V, QGD 1.7-13.5 nC ... ... ... ...
Functional block diagram

Main Stage side: 650v Gan E-mode MOSFET (validating)
Diode (fast recovery diode) : VR & GT; = 400V, CFP
MOSFET:VDSS 100 V,RDon:1-5mR
Secondary side diode (Schottky diode) : VR: 100V

Design Considerations

Load Point non-isolated DC-DC Buck converter circuit
Economical dual MOSFET design-low QG (Tot) and low FOM to achieve excellent efficiency, voltage drop while current rise