n 3V to 40V Input Voltage Range n 1.25A, 60V Integrated NPN Power Switch n Boundary Mode Operation n No Transformer Third Winding or Opto-Isolator Required for Regulation.

n Industrial, Automotive and Medical Isolated Power Supplies LT3573 Isolated Flyback Converter without an Opto-Coupler .

The LT®3573 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary-side flyback .

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