LT3574IMS#PBF - 

DC-DC Switching Flyback Regulator, Adjustable, 3V-40V in, 650mA out, 1MHz, MSOP-16

LT3574IMS#PBF - DC-DC Switching Flyback Regulator, Adjustable, 3V-40V in, 650mA out, 1MHz, MSOP-16

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Product Overview

The LT3574IMS#PBF is an Isolated Flyback Converter without an opto-coupler 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 waveform. A 0.65A, 60V NPN power switch is integrated along with all control logic. The LT3574 operates with input supply voltages from 3 to 40V and can deliver output power up to 3W with no external power devices. The LT3574 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation. The output voltage is easily set with two external resistors and the transformer turns ratio. Off-the-shelf transformers are available for many applications.
  • 0.65A, 60V Integrated NPN power switch
  • Boundary mode operation
  • No transformer third winding or opto-isolator required for regulation
  • Improved primary-side winding feedback load regulation
  • VOUT set with two external resistors
  • BIAS pin for internal bias supply and power NPN driver
  • Programmable soft-start
  • Programmable power switch current limit


Industrial, Automotive, Medical

Product Information

MSL 1 - Unlimited
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