1. Products
  2. Power Management
  3. Switching Regulators
  4. Flyback, Forward, and Isolated Controller
  5. LT8302/LT8302-3


Alternative Parts

Overview

Features and Benefits

  • 3V to 42V Input Voltage Range
  • 3.6A, 65V Internal DMOS Power Switch
  • Low Quiescent Current:
    • 106µA in Sleep Mode
    • 380µA in Active Mode
  • Quasi-Resonant Boundary Mode Operation at Heavy Load
  • Low Ripple Burst Mode® Operation at Light Load
  • Minimum Load < 0.5% (Typ) of Full Output
  • No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation
  • Accurate EN/UVLO Threshold and Hysteresis
  • Internal Compensation and Soft-Start
  • Temperature Compensation for Output Diode
  • Output Short-Circuit Protection
  • Thermally Enhanced 8-Lead SO Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LT8302/LT8302-3 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 3.6A, 65V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.

The LT8302/LT8302-3 operates from an input voltage range of 3V to 42V and delivers up to 18W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery.

Applications

  • Isolated Automotive, Industrial, Medical Power Supplies
  • Isolated Auxiliary/Housekeeping Power Supplies

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (3)

Documentation & Resources

  • View All (15)
  • 3rd Party Solutions (1)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (2)
  • Design Notes (1)
  • Product Selector Card (1)
  • Solutions Bulletins & Brochures (2)
  • Videos (2)
  • Press Releases (1)
  • Technical Articles (3)
  • Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    To launch ready-to-run LTspice demonstration circuits for this part:

    Step 1: Download and install LTspice on your computer.

    Step 2: Click on the link in the section below to download a demonstration circuit.

    Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

    LTspice

    Models for the following parts are available in LTspice:

    LT8302

    Reference Designs (1)

    Product Recommendations

    LT8302 Companion Parts

    Recommended Related Parts

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LT8302ES8E#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E-3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E-3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E-3#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302ES8E-3#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E-3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E-3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E-3#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302HS8E-3#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E-3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E-3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E-3#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302IS8E-3#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E-3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E-3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E-3#WPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302JS8E-3#WTRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302MPS8E#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    LT8302MPS8E#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch w/ EP)
    Wafer Fabrication Data R570 Reliability Data

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Lead Times


    Please see the latest communication from our CCO regarding lead times.

     

    Sampling


    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


    Price Table Help

     

    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.