LTM4673

Quad Output μModule Regulator with Digital Power System Management

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Overview

Features and Benefits
Product Details

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.

APPLICATIONS

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

Product Categories

Power Management
- µModule Buck Regulators

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Product Lifecycle 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)

DC2810A

LTM4673 | Quad Output μModule Regulator with Digital Power System Management

DC2810A

View Detailed Evaluation Kit Information

Demonstration circuit 2810A features the LTM4673: the wide input and output voltage range, high efficiency and power density, quad output DC/DC step-down μModule^® regulator with Digital Interface for control and monitoring. The DC2810A default input voltage range is 4.5V to 15V. However, if V_IN is lower than 4.5V, minor modification to certain existing onboard components is required. Please refer to Step 8: Operation at V_IN ≤ 4.5V in Quick Start Procedure section. The factory default output voltages are V_OUT0 = 1V, V_OUT3 = 0.9V at 12A per channel; V_OUT1 = 1.2V, V_OUT2 = 1.8V at 5A per channel. The DC2810A output voltages can be adjusted from 0.6V up to 3.3V for channel 0 and channel 3 and from 0.6V to 5.5V for channel 1 and channel 2. The default switching frequencies are 600kHz for channel 0 and channel 3 and 1MHz for channel 1 and channel 2. Forced airflow and heatsink might also be used to further optimize the output power when all output rails are on and fully loaded. Programming the output voltages to values greater than 1.8V, may require derating output current based on thermal derating curves provided in the data sheet of the LTM4673. The DC2810A comes with PMBus interface and digital power system management functions. An onboard 12-pin connector is available for users to connect the dongle DC1613A to the DC2810A and provides an easy way to communicate and program the part using LTpowerPlay^® software development tool. LTpowerPlay software and I²C/PMBus/SMBus Dongle DC1613A allows users to monitor real time telemetry of input and output voltages, input and output current, internal IC die temperatures, and fault logs.

The LTM4673 is available in a thermally enhanced, low profile, 361-Lead (16mm × 16mm × 4.72mm) BGA package. It is recommended to read the data sheet and demo manual of LTM4673 prior to use or making any hardware changes to DC2810A.

LTpowerPlay software can be downloaded here. The USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Resources

Documentation & Resources

Data Sheets

LTM4673: Quad Output μModule Regulator with Digital Power System Management Data Sheet (Rev. A)
3/17/2023

PDF

6 M

Videos

Quad Output μModule Regulator w Digital Power System Mgmt
9/22/2022

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 downloads and documentation

Models for the following parts are available in LTspice:

LTM4673

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.

LTpowerCAD download and documentation

Design tools for the following parts are available in LTpowerCAD:

LTM4673

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

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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.