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  5. LTC3255

Data Sheet
PDF
JP
User Guide
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Overview

Features and Benefits

  • Input Voltage Range: 4V to 48V
  • Adjustable Regulated Output: 2.4V to 12.5V
  • Output Current: 50mA Maximum
  • 16μA Quiescent Current in Regulation at No Load
  • Input Fault Protection from –52V to 60V
  • Multimode Charge Pump (2:1, 1:1) with Automatic Mode Switching Maintains Regulation Over Wide VIN Range
  • Input Voltage Shunt Mode for Current-Fed Applications
  • Power Good Output
  • Overtemperature and Short-Circuit Protection
  • Operating Junction Temperature: 150°C Maximum
  • Thermally Enhanced 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN packages

Product Details

The LTC3255 is a switched-capacitor step-down DC/DC converter that produces a regulated output (2.4V to 12.5V adjustable) from a 4V to 48V input. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge pumping extends output current capability beyond input supply current limits. At no load, Burst Mode® operation cuts VIN quiescent current to 16μA.

With its integrated VIN shunt regulator, the LTC3255 excels in 4mA to 20mA current loop applications. The device enables current multiplication; a 4mA input current can power a 7.4mA load continuously. Alternatively, the LTC3255 serves as a higher efficiency replacement for linear regulators and provides a space-saving inductorfree alternative to buck DC/DC converters.

The LTC3255 withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and overtemperature protection further enhance robustness. The LTC3255 is available in thermally enhanced 10-lead MSOP and low profile 3mm × 3mm 10-lead DFN packages.

Applications

  • Industrial Control, Factory Automation, Sensors, and SCADA Systems
  • Housekeeping Power Supplies
  • Current-Boosting Voltage Regulators for 4mA to 20mA Current Loops

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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 Sheet (1)
  • Reliability Data (1)
  • User Guide (1)
  • Product Selector Card (1)
  • Solutions Bulletin & Brochure (1)
  • Video (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:

    LTC3255

    Product Recommendations

    LTC3255 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
    LTC3255EDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255EDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255EMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255EMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255HDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255HDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255HMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255HMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255IDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255IDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255IMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255IMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255MPDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255MPDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3255MPMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3255MPMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    Wafer Fabrication Data R526 Reliability Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • LTC3255EMSE#PBF Production
    • LTC3255EMSE#TRPBF Production
    • LTC3255HMSE#PBF Production
    • LTC3255HMSE#TRPBF Production
    • LTC3255IMSE#PBF Production
    • LTC3255IMSE#TRPBF Production
    • LTC3255MPMSE#PBF Production
    • LTC3255MPMSE#TRPBF Production

    Support & Discussions

    LTC3255 Contact ADI Technical Support »
    LTC3255 Ask your question »
    LTC3255 Contact ADI Technical Support » LTC3255 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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