Linear Technology
DC617A - LT3781EG LTC1698EGN LT1783CS5 | Isolated Synchronous Forward Converter, +Vin = 36V - 72V, +Vout = 2.5V @ 20A, Quarter Brick footprint
Manual
LT1783 - Product Info
LT3781 - Product Info
LTC1698 - Product Info