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  6. LTC3124

Data Sheet
JP
User Guides
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Overview

Features and Benefits

  • VIN Range: 1.8V to 5.5V, 500mV After Start-Up
  • Adjustable Output Voltage: 2.5V to 15V
  • 1.5A Output Current for VIN = 5V and VOUT = 12V
  • Dual-Phase Control Reduces Output Voltage Ripple
  • Output Disconnects from Input When Shut Down
  • Synchronous Rectification: Up to 95% Efficiency
  • Inrush Current Limit
  • Up to 3MHz Programmable Switching Frequency Synchronizable to External Clock
  • Selectable Burst Mode® Operation: 25μA IQ
  • Output Overvoltage Protection
  • Internal Soft-Start
  • <1μA IQ in Shutdown
  • 16-Lead, Thermally-Enhanced 3mm × 5mm × 0.75mm DFN and TSSOP Packages

Product Details

The LTC3124 is a dual-phase, synchronous step-up DC/DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, minimizing inductor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV.

The LTC3124 switching frequency can be programmed from 100kHz to 3MHz to optimize applications for highest efficiency or smallest solution footprint. The oscillator can be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25μA, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up.

Other features include a <1μA shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3124 is offered in both 16-lead DFN and thermally-enhanced TSSOP packages.

Applications

  • RF, Microwave Power Amplifiers
  • Piezo Actuators
  • Small DC Motors, Thermal Printers
  • 12V Analog Rail from Battery, 5V, or Backup Capacitor

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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 (1)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Solutions Bulletins & Brochures (1)
  • Press Releases (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:

    LTC3124

    LTpowerCAD

    LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

    To open the project file for this circuit:

    Step 1: Download and install LTpowerCAD on your computer.

    Step 2: Click on the link(s) in the section below to download part-specific project files.

    Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

    LTPowerCAD

    LTpowerCAD Project Files

    LTC3124 Project - 15V, 5A 2-Phase Synchronous Boost Converter (1.8-5.5V to 12V @ 1.5A)

    Design tools for the following parts are available in LTpowerCAD:

    LTC3124

    Product Recommendations

    LTC3124 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
    LTC3124EDHC#PBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
    LTC3124EDHC#TRPBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
    LTC3124EFE#PBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    LTC3124EFE#TRPBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    LTC3124HFE#PBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    LTC3124HFE#TRPBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    LTC3124IDHC#PBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
    LTC3124IDHC#TRPBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
    LTC3124IFE#PBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    LTC3124IFE#TRPBF Material Declaration Reliability Data 16-Lead TSSOP w/ EP
    Wafer Fabrication Data R526 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LTC3124EFE#PBF Production
    • LTC3124EFE#TRPBF Production
    • LTC3124HFE#PBF Production
    • LTC3124HFE#TRPBF Production
    • LTC3124IFE#PBF Production
    • LTC3124IFE#TRPBF Production

    Support & Discussions

    LTC3124 Discussions

    RE: LTC3124 Variation of softstart time
    All LTC3124 Discussions
    LTC3124 Contact ADI Technical Support »
    LTC3124 Ask your question »
    LTC3124 Contact ADI Technical Support » LTC3124 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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