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Data Sheet
PDF
JP
User Guide
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Overview

Features and Benefits

  • High Efficiency: Up to 95%
  • Up to 3A Continuous Output Current
  • 4-Phase Operation for Low Output Ripple and Tiny Solution Size
  • Output Disconnect and Inrush Current Limiting
  • Very Low Quiescent Current: 12µA
  • 0.5V to 4.5V Input Range
  • 2.4V to 5.25V Adjustable Output Voltage
  • Adjustable Current Limit
  • Adjustable, Fixed Frequency Operation from 100kHz to 2MHz per Phase
  • Synchronizable Oscillator with Sync Output
  • Internal Synchronous Rectifiers
  • Manual or Automatic Burst Mode® Operation
  • Power Good Comparator
  • <1µA Shutdown Current
  • Antiringing Control
  • 5mm x 5mm Thermally Enhanced QFN Package

Product Details

The LTC3425 is a synchronous, 4-phase boost converter with output disconnect capable of operation below 1V input. It includes four N-channel MOSFET switches and four P-channel synchronous rectifiers for an effective RDS(ON) of 0.045Ω and 0.05Ω, respectively. 4-phase operation greatly reduces peak inductor currents, and capacitor ripple current, and increases effective switching frequency, minimizing inductor and capacitor sizes. True output disconnect eliminates inrush current and allows zero load current in shutdown. External Schottky diodes are not required in most applications (VOUT < 4.3V). Power saving Burst Mode operation can be user controlled or left in automatic mode.

Other features include 1µA shutdown current, programmable frequency with sync in and out, programmable soft-start, antiringing control, thermal shutdown, adjustable current limit, reference output and power good comparator.

The LTC3425 is available in a small, thermally enhanced 32-pin QFN package.

Applications

  • Handheld Computers
  • Point-of-Load Regulators
  • 3.3V to 5V Conversion

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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 (2)

Documentation & Resources

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  • Data Sheet (1)
  • Reliability Data (1)
  • User Guide (1)
  • Design Note (1)
  • Technical Article (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:

    LTC3425

    Product Recommendations

    LTC3425 Companion Parts

    Recommended Suggested Oscillator

    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
    LTC3425EUH#PBF Material Declaration Reliability Data 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
    LTC3425EUH#TRPBF Material Declaration Reliability Data 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
    Wafer Fabrication Data R415 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LTC3425EUH#PBF Production
    • LTC3425EUH#TRPBF Production

    Support & Discussions

    LTC3425 Discussions

    RE: LTC3425 input filter
    All LTC3425 Discussions
    LTC3425 Contact ADI Technical Support »
    LTC3425 Ask your question »
    LTC3425 Contact ADI Technical Support » LTC3425 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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