Description
The LT® 3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. The device integrates a 240mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.

FEATUREs
  4.5V to 100V Input Voltage Range
  Internal 240mA, 150V Power Switch
  Boundary Mode Operation
  No Transformer Third Winding or Opto-Isolator Required for Regulation
  Improved Primary-Side Winding Feedback Load Regulation
  VOUTSet with Two External Resistors
  BIAS Pin for Internal Bias Supply and Power Switch Driver
  No External Start-Up Resistor
  16-Lead MSOP Package

APPLICATIONs
Isolated Telecom Power Supplies
Isolated Auxiliary/Housekeeping Power Supplies
Isolated Industrial, Automotive and Medical Power Supplies