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  4. Inductorless (Charge Pump) LED Drivers
  5. LTC3214

Data Sheet
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Overview

Features and Benefits

  • Low Noise Constant Frequency Operation
  • High Efficiency: Up to 94%
  • Multi-Mode Operation: 1x, 1.5x or 2x Boost Modes
  • Automatic Mode Switching
  • High Output Current: Up to 500mA
  • Tiny Application Circuit (3mm × 3mm DFN Package All Components <1mm High)
  • Automatic Soft-Start
  • Output Disconnect
  • Open, Shorted LED Protection
  • No Inductors
  • Internal 110mΩ LED Current Sense Resistor 3mm × 3mm 10-Lead DFN Package

Product Details

The LTC3214 is a low noise, high current charge pump DC/DC converter capable of driving high current LEDs at up to 500mA from a 2.9V to 4.5V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors at VIN and CPO) make the LTC3214 ideally suited for small, battery-powered applications.

Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors.

Output current level is programmed by an external resistor. LED current is regulated using an internal 110mΩ sense resistor. Automatic mode switching optimizes efficiency by monitoring the voltage across the charge pump and switching modes only when dropout is detected. The part is available in a low profile 3mm x 3mm 10-lead DFN package.

Applications

  • LED Torch/Camera Light Supply for Cell Phones, PDAs and Digital Cameras
  • General Lighting and/or Flash/Strobe Applications

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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 (2)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (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.

    LTspice

    Models for the following parts are available in LTspice:

    LTC3214

    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
    LTC3214EDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3214EDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    Wafer Fabrication Data R415 Reliability Data

    Support & Discussions

    LTC3214 Contact ADI Technical Support »
    LTC3214 Ask your question »
    LTC3214 Contact ADI Technical Support » LTC3214 Ask your question »

    Sample & Buy


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    Evaluation Boards

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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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