LTM4676 - Dual 13A or Single 26A μModule Regulator with Digital Power System Management


  • Order Custom Programmed Parts
  • 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 5.4V (4V on VOUT0)
  • ±1% 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
  • Constant Frequency Current Mode Control
  • Parallel and Current Share Multiple Modules
  • 16 Slave Addresses; Rail/Global Addressing
  • 16mm × 16mm × 5.01mm BGA Package
  • Download LTpowerPlay Software

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
    • OV/UV/OT, UVLO, Frequency and Phasing

Typical Application

LTM4676 Typical Application
LTM4676 Typical Application
LTM4676 Typical Application
LTM4676 Typical Application
LTM4676 Typical Application


The LTM®4676 is a dual 13A or single 26A step-down uModule® (micromodule) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I2C-based digital interface protocol . The LTM4676 is comprised of fast analog control loops, precision mixedsignal circuitry, EEPROM, power MOSFETs, inductors and supporting components.

The LTM4676’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. 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 pin-strapping resistors. The LTpowerPlay™ GUI and DC1613 USB-to-PMBus converter and demo kits are available.

The LTM4676 is offered in a 16mm × 16mm × 5.01mm BGA package available with SnPb or RoHS compliant terminal finish.

(MAX) (ms)
LTM4676 170 4.5 to 26.5 0.5V to 4 (CH0)
0.5 to 5.5 (Both CH)
LTM4676A 70 4.5 to 17 0.5 to 5.5 (Both CH)
See Table 1 and page 22 for more on LTM4676A’s enhancements over LTM4676's feature set.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

For complete and up to date package information and drawings, please refer to our packaging page

16mm x 16mm x 5.01mm BGA

LTM4676 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM4676EY#PBF BGA 144 E $47.93 $33.55 View
LTM4676IY#PBF BGA 144 I $52.73 $36.91 View
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* 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1811A LTM4676 Demo Board | Dual Buck µModule Regulator, 4.5V ≤ VIN ≤ 26.5V, Vout0 = 1V @ 13A, Vout1 = 1.8V @ 13A Contact Factory
DC1811B-KIT DC1811B with DC1613A | LTM4676 (DC1811) with USB-to-PMBus Adapter (DC1613A) $115.00
DC1989A-A LTM4676 Demo Board | LTM4676(x2) Current Shared, PSM, 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 4V @ 50A $105.00
DC1989A-B LTM4676 Demo Board | LTM4676(x3) Current Shared, PSM, 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 4V @ 75A $135.00
DC1989A-C LTM4676 Demo Board | LTM4676(x4) Current Shared, PSM, 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 4V @ 100A $165.00
DC2087A LTM4676 Demo Board | Buck µModule, 4.5V ≤ VIN ≤ 16V, Vout = 1V @ 26A $65.00
DC2106A-B LTM4676 & LTM4630 Demo Board | 4.5V to 16VIN, 0.5V to 1.8VOUT @ 130A, One LTM4676 & Three LTM4630s Current Shared $165.00
DC2269A-A LTM4676EY Plug In Demo Board | Dual 13A Buck μModule with PMBus, 4.5V ≤ VIN ≤ 26.5V, Vout0 = 1V @ 13A, Vout1 = 1.8V @ 13A Contact Factory
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Companion Boards

Part Number Description Price Documentation
DC1613A USB-to-PMBus Controller $50.00
DC2086A Powered Programming Adapter for Digital Power System Management Products $199.00
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Click here to view our complete list of demo boards


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Design Tools


The LTpowerCAD II design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:


LTpowerPlay is a powerful development environment supporting Linear Technology's Digital Power System Management (PSM) products, providing unprecedented diagnostic and debug features.

Click here to download LTpowerPlay


LTspice® IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

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Models for the following parts are available in LTspice IV:

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