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  6. LTC3427

Data Sheet Rev. B
PDF
JP
User Guides
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Overview

Features and Benefits

  • High Efficiency: Up to 94%
  • 3.3V at 200mA from Two Alkaline Cells
  • 5V at 200mA from a Single Li-Ion Cell
  • Inrush Current Limiting and Soft-Start
  • Output Disconnect in Shutdown
  • 1.8V to 5V VIN Range
  • 1.8V to 5.25V VOUTRange
  • 1.25MHz Fixed Frequency, Low Noise PWM
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (<1μA)
  • Anti-Ringing Control Minimizes EMI
  • Tiny External Components
  • Short-Circuit Protection
  • Low Profile (0.75mm × 2mm × 2mm) DFN Package

Product Details

The LTC3427 is the industry’s first high efficiency, fixed frequency, step-up DC/DC converter with true output disconnect in a 6-lead 2mm × 2mm DFN package. Requiring minimal external components, the LTC3427 operates from an input voltage as low as 1.8V. The LTC3427 contains an internal 0.525Ω N-channel MOSFET switch and a 0.575Ω P-channel MOSFET synchronous rectifier, which enables it to supply 200mA at 3.3V from a 2-cell alkaline battery input.

The LTC3427 limits inrush current during start-up and provides a soft-start of VOUT. A switching frequency of 1.25MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors and produces very low VOUT ripple. The current mode PWM design is internally compensated, reducing external parts count. Anti-ringing control reduces EMI in discontinuous mode operation. The LTC3427 also features low shutdown current of under 1μA and thermal shutdown.

APPLICATIONS

  • Handheld Instruments
  • Digital Cameras
  • Wireless Handsets
  • GPS Receivers
  • Portable Medical Devices
  • MP3 Players

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

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

    LTC3427 Demo Circuit - 2-Cell Alkaline to 3.3V Synchronous Boost Converter (1.8-3.6V to 3.3V @ 180mA)

    Models for the following parts are available in LTspice:

    LTC3427
    LTC3427-2

    Product Recommendations

    LTC3427 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
    LTC3427EDC#TRMPBF Material Declaration Reliability Data 6-Lead DFN (2mm x 2mm w/ EP)
    LTC3427EDC#TRPBF Material Declaration Reliability Data 6-Lead DFN (2mm x 2mm w/ EP)
    Wafer Fabrication Data R415 Reliability Data

    Support & Discussions

    LTC3427 Contact ADI Technical Support »
    LTC3427 Ask your question »
    LTC3427 Contact ADI Technical Support » LTC3427 Ask your question »

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