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  3. LED Driver IC
  4. Step-Down (Buck) LED Drivers
  5. LT3590

Data Sheet
JP
User Guides
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Overview

Features and Benefits

  • 4.5V to 55V Input Voltage Range
  • Up to 50mA LED Current
  • 80mA, 55V Switch
  • Internal Schottky Diode
  • 15µA Supply Current in Shutdown
  • 500µA Supply Current Operating, Not Switching
  • Switching Frequency: 850kHz
  • 200mV Feedback Voltage with ±5% Accuracy
  • CTRL Input Performs Dimming and Shutdown
  • 91% Efficiency (10 LEDs, 50mA)
  • Requires Only 1µF Output Capacitor
  • 8-Lead SC70 Package
  • 6-Lead 2mm × 2mm DFN Package

Product Details

The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series from a 48V DC source. Series connection of the LEDs provides identical LED currents of up to 50mA, resulting in uniform brightness and eliminating the need for ballast resistors. A fixed frequency, current mode architecture results in stable operation over a wide range of input voltage and output voltage.

The high switching frequency of 850kHz permits the use of tiny, low profile inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. The power switch, Schottky diode and control circuitry are all contained inside a space saving SC70 package or 2mm × 2mm DFN package to allow a small converter footprint and lower parts cost.

Applications

  • LED Fixed Signage
  • Traffic Signs
  • Neon Sign Replacement

Product Categories

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Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

  • View All (5)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Press Releases (1)
  • Technical Articles (1)
    • Document Type

    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

    LTspice Simulations

    LT3590 Demo Circuit - 48V Buck-Mode LED Driver (48V to 10x 2.4V LEDs @ 50mA)

    Models for the following parts are available in LTspice:

    LT3590

    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
    LT3590EDC#TRMPBF Material Declaration Reliability Data 6-Lead DFN (2mm x 2mm w/ EP)
    LT3590EDC#TRPBF Material Declaration Reliability Data 6-Lead DFN (2mm x 2mm w/ EP)
    LT3590ESC8#TRMPBF Material Declaration Reliability Data 8-Lead SC70
    LT3590ESC8#TRPBF Material Declaration Reliability Data 8-Lead SC70
    Wafer Fabrication Data R518 Reliability Data

    Support & Discussions

    LT3590 Discussions

    RE: Overshoot at SW pin on LT3590
    All LT3590 Discussions
    LT3590 Contact ADI Technical Support »
    LT3590 Ask your question »
    LT3590 Contact ADI Technical Support » LT3590 Ask your question »

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    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.

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