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  2. Power Monitor, Control, and Protection
  3. Digital Power System Management
  4. µModule Regulators with Digital Power System Management
  5. LTM4681

Data Sheet Rev. A
PDF
JP
User Guide Rev. 0
4 View All

Overview

Features and Benefits

  • Quad Digitally Adjustable Analog Loops with Digital Interface for Control and Monitoring
  • Wide Input Voltage Range: 4.5V to 16V
  • Output Voltage Range: 0.5V to 3.3V
  • ±0.5% Maximum DC Output Error Over Temperature
  • ±4% Current Readback Accuracy: 0°C to 125°C
  • Integrated Input Current Sense Amplifier
  • 400kHz PMBus-Compliant I2C Serial Interface
  • Supports Telemetry Polling Rates Up to 125Hz
  • Integrated 16-Bit ΔΣ ADC
  • Parallel and Current Share Multiple Modules
  • 15mm × 22mm × 8.17mm BGA Package
  • Readable Data:
    • Input and Output Voltages, Currents, and Temperatures
    • Running Peak Values, Uptime, Faults and Warnings
    • Onboard EEPROM Fault Log Record
  • Writable Data and Configurable Parameters:
    • Output Voltage, Voltage Sequencing and Margining
    • Digital Soft-Start/Stop Ramp, Program Analog Loop
    • OV/UV/OT, UVLO, Frequency and Phasing

Product Details

The LTM4681 is a quad 31.25A or single 125A stepdown μModule® (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus. The LTM4681 is comprised of digitally programmable analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components.

The LTM4681’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at programmable slew rates with sequencing delay times. True input current sense, output currents and voltages, output power, temperatures, uptime and peak values are readable. Custom configuration of the EEPROM contents is not required. At start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pinstrapping resistors. The LTpowerPlay® GUI and DC1613 USB-to-PMBus converter and demo kits are available. 

The LTM4681 is offered in a 15mm × 22mm × 8.17mm BGA package available with SnPb or RoHS compliant terminal finish.

APPLICATIONS

  • Multi-Rail Processor Power, Configurable Core Power

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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 (4)

Documentation & Resources

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  • Data Sheet (1)
  • User Guide (4)
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    Tools & Simulations

    LTspice

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    LTspice

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    LTM4681

    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
    LTM4681EY#PBF Material Declaration Reliability Data 330-Lead BGA (22mm x 15mm x 8.17mm)
    LTM4681IY#PBF Material Declaration Reliability Data 330-Lead BGA (22mm x 15mm x 8.17mm)
    Wafer Fabrication Data

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    • LTM4681EY#PBF Production
    • LTM4681IY#PBF Production

    Support & Discussions

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