Data Sheet Rev. F
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Alternative Parts

LTC3880
LTC3880

Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Overview

Features and Benefits

  • PMBus/I2C Compliant Serial Interface
    • Telemetry Read-Back Includes VIN, IIN, VOUT, IOUT, Temperature and Faults
    • Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC and Frequency Synchronization (250kHz to 1MHz)
  • ±0.5% Output Voltage Accuracy over Temperature
  • Integrated 16-Bit ADC and 12-Bit DAC
  • Integrated High Side Current Sense Amplifier
  • Internal EEPROM with ECC and Fault Logging
  • Integrated N-Channel MOSFET Gate Drivers

Power Conversion

  • Wide VIN Range: 4.5V to 24V
  • VOUT Range: 0.5V to 5.4V
  • Analog Current Mode Control Loop
  • Accurate PolyPhase® Current Sharing for Up to 6 Phases
  • Auto Calibration of Inductor DCR
  • Minimum On Time 45ns
  • Available in a 32-Lead (5mm × 5mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3883/LTC3883-1 are PolyPhase capable DC/DC synchronous step-down switching regulator controllers with a PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by the LTPowerPlay™ software development tool with graphical user interface (GUI).

Switching frequency, output voltage, and device address can be programmed using external configuration resistors. Additionally, parameters can be set via the digital interface or stored in on-chip EEPROM.

The LTC3883/LTC3883-1 can be configured for Burst Mode® operation, discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3883 incorporates an internal 5V linear regulator while the LTC3883-1 uses an external 5V supply for minimum power loss.

The LTC3883/LTC3883-1 are available in a 32-lead 5mm × 5mm QFN package.

Applications

  • High Current Distributed Power Systems
  • Telecom Systems
  • Intelligent Energy Efficient Power Regulation

Product Categories

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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 (3)

Documentation & Resources

  • View All (24)
  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (6)
  • User Guides (2)
  • Product Information (1)
  • Product Selector Card (3)
  • Videos (4)
  • Press Releases (1)
  • Technical Articles (5)
    • 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

    LTC3883 Demo Circuit - High Efficiency 425kHz 1.8V Step-Down Converter with Inductor DCR Current Sensing (6-24V to 1.8V @ 20A)

    Models for the following parts are available in LTspice:

    LTC3883
    LTC3883-1

    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

    LTC3883 Project - Single Phase Step-Down DC/DC Controller with Digital Power System Management & Rsense Current Sensing (6.5-24V to 1.8V @ 20A)
    LTC3883 Project - Single Phase Step-Down DC/DC Controller with Digital Power System Management & Inductor DCR Current Sensing (6.5-24V to 1.8V @ 20A)

    Design tools for the following parts are available in LTpowerCAD:

    LTC3883

    Linduino

    Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

    Linduino code repository on GitHub and instructions on how to use the code.

    Purchase Linduino

    Linduino

    Code Files

    LTC3883 - Linduino CPP File
    LTC3883 - Linduino Header File
    LTC3883 - DC1778A Linduino .INO File

    Design Tools

    LTpowerPlay®

    LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

    Product Recommendations

    LTC3883 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.

    LTC3883
    LTC3883-1 Material Declaration
    Quality And Reliability
    Symbols and Footprints

    Support & Discussions

    LTC3883 Discussions

    RE: LTC3883 VIN=5V
    RE: LTC3883 ESD Protection
    All LTC3883 Discussions
    LTC3883 Contact ADI Technical Support »
    LTC3883 Ask your question »
    LTC3883 Contact ADI Technical Support » LTC3883 Ask your question »

    Sample & Buy


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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    Price Table Help

     

    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    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.