Data Sheet Rev. C
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Alternative Parts

LTC3880
LTC3880

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

LTC3882-1<br>LTC3882-2
LTC3882-1
LTC3882-2

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

Overview

Features and Benefits

  • PMBus/I2C Compliant Serial Interface
    • Monitor Voltage, Current, Temperature and Faults
    • Digitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds
  • 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT ≤ 5.25V
  • ±0.5% Output Voltage Accuracy
  • Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with Fault Logging and ECC
  • IC Supply Range: 3V to 13.2V
  • Resistor or Inductor DCR Current Sensing
  • Optional Resistor Programming for Key Parameters
  • 40-Pin (6mm × 6mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3882 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with PMBus compliant serial interface. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages from 0.5V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. Up to four LTC3882s can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.

LTC3882 system configuration and monitoring is supported by the LTpowerPlay® software tool. The device’s serial interface can be used to read back input voltage, output voltage and current, temperature and fault status. A wide range of operating parameters can be set via the digital interface or stored in internal EEPROM for use at power up. Switching frequency and phase, output voltage and device address can also be programmed using external configuration resistors.

PWM Enable Output TG/BG Control HW Write Protect Dedicated PGOOD Differential Vout Sense
LTC3882 Yes Yes Yes No  VOUT0 Only
LTC3882-1  No No No Yes VOUT0 & VOUT1

Applications

  • High Current Distributed Power Systems
  • Servers, Network and Storage Equipment
  • Intelligent Energy Efficient Power Regulation
  • Industrial/Telecom/ATE Systems

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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 (5)

Documentation & Resources

  • View All (22)
  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (7)
  • User Guides (4)
  • Spec Notice (1)
  • Product Selector Card (1)
  • Solutions Bulletins & Brochures (1)
  • Videos (3)
  • Press Releases (1)
  • Technical Articles (2)
    • Document Type
    Application Notes

    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:

    LTC3882
    LTC3882-1

    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

    LTC3882 Project - Dual Output PolyPhase Voltage Mode Step-Down DC/DC Controller with PSM (7-14V to 1V & 1V @ 30A)

    Design tools for the following parts are available in LTpowerCAD:

    LTC3882

    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

    LTC3882 - Linduino CPP File
    LTC3882 - Linduino Header File
    LTC3882 - DC1936A Linduino .INO File

    Reference Designs (1)

    Product Recommendations

    LTC3882 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.

    LTC3882 Material Declaration
    Quality And Reliability
    Symbols and Footprints

    Support & Discussions

    LTC3882 Discussions

    RE: LTC3882 strange VSENSE0- behavior in spice model
    RE: LTC3882 multiphase current sharing at load step
    All LTC3882 Discussions
    LTC3882 Contact ADI Technical Support »
    LTC3882 Ask your question »
    LTC3882 Contact ADI Technical Support » LTC3882 Ask your question »

    Sample & Buy


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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.