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Datasheet Linear Technology LT3748MPMS#PBF

ManufacturerLinear Technology
Part NumberLT3748MPMS#PBF

100V Isolated Flyback Controller


  • Download » Datasheet, PDF, 542 Kb, Revision: B
    LT3748 - 100V Isolated Flyback Controller
    Docket ↓
    100V Isolated
    Flyback Controller
    Features Description 5V to 100V Input Voltage Range
    nn 1.9A Average Gate Drive Source and Sink Current
    nn Boundary Mode Operation
    nn No Transformer Third Winding or Opto-Isolator
    Required for Regulation
    nn Primary-Side Winding Feedback Load Regulation
    nn V
    OUT Set with Two External Resistors
    nn INTV
    CC Pin for Control of Gate Driver Voltage
    nn Programmable Soft Start
    nn Programmable Undervoltage Lockout
    nn Available in MSOP Package The LTВ®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. nn The LT3748 utilizes boundary mode to provide a small
    magnetic solution without compromising load regulation. ...



Package CodeMS


Demo BoardsDC1557A,DC1860B,DC1961A,DC1694B
Design ToolsLTspice File
Export Controlno yes/no
FeaturesBoundary Mode Operation, No Opto Isolator
Integrated Inductorno yes/no
Isupply1.3 mA
Monolithicno yes/no
Number of Outputs1
Operating Temperature Range-55 to 125 °C
Polyphaseno yes/no
Switch Current25 A
Synchronousno yes/no
Vin Max100 V
Vin Min5 V

Eco Plan


Moldel Line

Series: LT3748 (8)

Manufacturer's Classification

  • Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators

Other Names:


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