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Datasheet Linear Technology LT3574EMS#TRPBF

ManufacturerLinear Technology
Part NumberLT3574EMS#TRPBF

Isolated Flyback Converter Without an Opto-Coupler


  • Download » Datasheet, PDF, 296 Kb, Revision: F
    LT3574 - Isolated Flyback Converter Without an Opto-Coupler
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    Isolated Flyback Converter
    Without an Opto-Coupler
    Features n n n n n n Description 3V to 40V Input Voltage Range
    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
    16-Lead MSOP Package The LTВ®3574 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 waveform. A 0.65A, 60V NPN power
    switch is integrated along with all control logic into a
    16‑lead MSOP package.
    The LT3574 operates with input supply voltages from
    3V to 40V, and can deliver output power up to 3W with ...



Package CodeMS


Demo BoardsDC1636A
Design ToolsLTspice File
Export Controlno yes/no
FeaturesBoundary Mode Operation, No Opto Isolator
Frequency1000 kHz
Integrated Inductorno yes/no
Isupply3.5 mA
Monolithicyes yes/no
Number of Outputs1
Operating Temperature Range0 to 85 °C
Polyphaseno yes/no
Switch Current0.9 A
Synchronousno yes/no
Vin Max40 V
Vin Min3 V

Eco Plan


Moldel Line

Series: LT3574 (4)

Manufacturer's Classification

  • Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers

Other Names:


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