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  6. LTM4676A

Data Sheet Rev. B
PDF
User Guide
6 View All

Alternative Parts

LTM4675
LTM4675

Dual 9A or Single 18A μModule Regulator with Digital Power System Management

LTM4676
LTM4676

Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management

LTM4677
LTM4677

Dual 18A or Single 36A μModule (Power Module) Regulator with Digital Power System Management

Overview

Features and Benefits

  • Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring
  • Wide Input Voltage Range: 4.5V to 26.5V
  • Output Voltage Range: 0.5V to 5.5V
  • ±0.5% Maximum DC Output Error Over Temperature
  • ±2.5% Current Readback Accuracy at 10A Load
  • 400kHz PMBus-Compliant I2C Serial Interface
  • Integrated 16-Bit ΔΣ ADC
  • Supports Telemetry Polling Rates Up to 125Hz
  • Constant Frequency Current Mode Control
  • Parallel and Current Share Multiple Modules
  • All 7-Bit Slave Addresses Supported
  • Pin-Compatible to Dual 18A LTM4677
  • 16mm × 16mm × 5.01mm BGA Package

Readable Data:

  • Input and Output Voltages, Currents, and Temperatures
  • Running Peak Values, Uptime, Faults and Warnings
  • Onboard EEPROM Fault Log Record with ECC

Writable Data and Configurable Parameters:

  • Output Voltage, Voltage Sequencing and Margining
  • Digital Soft-Start/Stop Ramp
  • OV/UV/OT, UVLO, Frequency and Phasing

Product Details

The LTM4676A is a dual 13A or single 26A step-down µModule® (micromodule) DC/DC regulator with 40ms turn-on time. It features remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I2C-based digital interface protocol . The LTM4676A is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components.

The LTM4676A’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at programmable slew rates with sequencing delay times. Input and output currents and voltages, output power, temperatures, uptime and peak values are readable. At start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pin-strapping resistors. The LTpowerPlay™ GUI and DC1613 USB-to-PMBus converter and demo kits are available.

The LTM4676A is pin-compatible and the improved performance version of the LTM4676.

Part Number Turn-on Start-up Time (MAX) (ms) VIN Range (V) VOUT Range (V) Pin-compatible
LTM4676 170 4.5 to 26.5 0.5V to 4 (CH0)
0.5 to 5.5 (Both CH)		 Yes
LTM4676A 70 4.5 to 17 0.5 to 5.5 (Both CH)

Applications

  • System Optimization, Characterization and Data Mining in Prototype, Production and Field Environments

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 (6)

Documentation & Resources

  • View All (20)
  • Data Sheet (1)
  • Application Note (7)
  • User Guide (6)
  • Product Information (1)
  • Product Selector Card (3)
  • Informational (1)
  • Solutions Bulletin & Brochure (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:

    LTM4676
    LTM4676A

    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

    LTM4676A Project - Dual Step-Down μModule Regulator (4.5-14V to 1V @ 13A & 1.8V @ 13A)
    LTM4676A Project - 26A Step-Down μModule Regulator (4.5-16V to 1.2V @ 26A)

    Design tools for the following parts are available in LTpowerCAD:

    LTM4676
    LTM4676A

    Reference Designs (1)

    Product Recommendations

    LTM4676A 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
    LTM4676AEY#PBF Material Declaration Reliability Data 144-Lead BGA (16mm x 16mm x 5.01mm)
    LTM4676AIY Material Declaration Reliability Data 144-Lead BGA (16mm x 16mm x 5.01mm)
    LTM4676AIY#PBF Material Declaration Reliability Data 144-Lead BGA (16mm x 16mm x 5.01mm)
    Wafer Fabrication 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
    • LTM4676AEY#PBF Production
    • LTM4676AIY Production
    • LTM4676AIY#PBF Production

    Support & Discussions

    LTM4676A Discussions

    RE: LTM4675 configure in negative output voltage (-VOUT)
    RE: Questions about initial register setting of LTM4676A & LTM4677
    All LTM4676A Discussions
    LTM4676A Contact ADI Technical Support »
    LTM4676A Ask your question »
    LTM4676A Contact ADI Technical Support » LTM4676A Ask your question »

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