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  3. LED Driver IC
  4. Step-Up (Boost) LED Drivers
  5. LT3591

Data Sheet
PDF
User Guide
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Overview

Features and Benefits

  • Drives Up to Ten White LEDs from a 3V Supply
  • High Side Sense Allows “One Wire Current Source”
  • Internal Schottky Diode
  • One Pin Dimming and Shutdown
  • 80:1 True Color PWM™ Dimming Range
  • 42V Open LED Protection
  • 1MHz Switching Frequency
  • ±5% Reference Accuracy
  • VIN Range: 2.5V to 12V
  • Requires Only 2.2µF Output Capacitor
  • Low Profile 8-Lead DFN Package
  • (3mm × 2mm × 0.75mm)

Product Details

The LT3591 is a fixed frequency step-up DC/DC converter specifically designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler one wire LED connection. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.

The high switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. Few external components are needed: open-LED protection and the Schottky diode are all contained inside a low profile 3mm × 2mm DFN package.

Applications

  • Tape and Reel: Add #TR
  • Lead Free: Add #PBF
  • Lead Free Tape and Reel: Add #TRPBF

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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 (3)
  • Data Sheet (1)
  • Reliability Data (1)
  • User Guide (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

    LT3591 Demo Circuit - White LED Driver (3.6V to 10x 3.6V LEDs @ 20mA)

    Models for the following parts are available in LTspice:

    LT3591

    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
    LT3591EDDB#TRMPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
    LT3591EDDB#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
    Wafer Fabrication Data R518 Reliability Data

    Support & Discussions

    LT3591 Discussions

    RE: Pin3 and Pin10 of LT3591
    19 week(s) ago in Power Management
    RE: LT3591
    All LT3591 Discussions
    LT3591 Contact ADI Technical Support »
    LT3591 Ask your question »
    LT3591 Contact ADI Technical Support » LT3591 Ask your question »

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    Evaluation Boards

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    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.

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