DESCRIPTION
The LT®3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power. It drives a low side external N-channel power MOSFET from an internally regulated 7V supply. No third winding or opto-isolator is required for regulation as the part senses the isolated output voltage directly from the primary-side flyback waveform.

FEATURES
■ 5V to 100V Input Voltage Range
■ 1.9A Average Gate Drive Source and Sink Current
■ Boundary Mode Operation
■ No Transformer Third Winding or Opto-Isolator Required for Regulation
■ Primary-Side Winding Feedback Load Regulation
■ VOUT Set with Two External Resistors
■ INTVCC Pin for Control of Gate Driver Voltage
■ Programmable Soft Start
■ Programmable Undervoltage Lockout
■ Available in MSOP Package

APPLICATIONS
■ Isolated Telecom Converters
■ High Power Automotive Supplies
■ Isolated Industrial Power Supplies