1. Products
  2. Power Management
  3. µModule Regulators
  4. µModule Buck Regulators
  5. LTM4673


Features and Benefits

  • Quad Outputs, Dual 12A and Dual 5A, Step-Down μModule® Regulator with Digital Interface
  • Wide Input Voltage Range: 4.5V to 15V
  • Dual 12A DC Output From 0.6V to 3.3V
  • Dual 5A DC Output From 0.6V to 5.5V
  • ±0.5% Total Output Voltage Regulation with Servo
  • ±5% Current Readback Accuracy in 12A Channels
  • 400kHz PMBus-Compliant I2C Serial Interface
  • Integrated 16-Bit ΔΣ ADC
  • Accurate Monitoring Input and Four Output Voltages, Currents, and Temperatures
  • Digital Programmable Output Voltage Trim, Sequencing and Margining for Each Channel
  • Manage Faults and Warnings
  • Onboard EEPROM Fault Log Record
  • Dual True Differential Sensing Amplifier
  • Parallelable Output for Higher Output Current
  • Drop-In Pin Compatible with Quad Output LTM4671 Non-PSM μModule Regulator
  • 16mm × 16mm × 4.72mm BGA Package

Product Details

The LTM4673 is a quad output, dual 12A and dual 5A, switching mode DC/DC step-down μModule (powermodule) regulator integrated with 4-channel Power System Manager used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry, and create fault logs. Operating over an input voltage range of 4.5V to 15V, the LTM4673 supports an output voltage range of 0.6V to 3.3V for 12A channels and 0.6V to 5.5V for 5A channels. Only bulk input and output capacitors are needed.

The LTM4673’s 2-wire serial interface allows outputs to be precisely margined, tuned and programmable sequenced up and down. An internal 16-bit ADC monitors and supervises input and all four output voltages, currents and temperatures. Faults can be programmed for overcurrent and undercurrent, voltage and temperature threshold limits for four output channels as well as over and undervoltage for the input.

The LTM4673 is offered in a 16mm × 16mm × 4.72mm BGA package with RoHS compliant terminal finish.


  • Telecom, Networking and Industrial Equipment
  • Multi-Rail Point of Load Regulation
  • FPGAs, DSPs and ASICs Application

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)

Tools & Simulations


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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
LTM4673EY#PBF Material Declaration Reliability Data 361-Lead BGA (16mm x 16mm x 4.72mm)
LTM4673IY#PBF Material Declaration Reliability Data 361-Lead BGA (16mm x 16mm x 4.72mm)
Wafer Fabrication Data

Sample & Buy

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Evaluation Boards

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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.