LTM4647

30A DC/DC Step-Down μModule Regulator

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Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

4.7V to 15V Input Voltage Range
0.6V to 1.8V Output Voltage Range
30A DC Output Current
±1.2% Total DC Output Voltage Error (–40°C to 125°C)
High Reliability N + 1 Phase Redundancy Supported
Internal or External Control Loop Compensation
Differential Remote Sense Amplifier for Precision Regulation
Current Mode Control/Fast Transient Response
Multiphase Current Sharing Up to 180A
Built-In Temperature Monitoring
Selectable Pulse-Skipping, Burst Mode^® Operation
Soft-Start/Voltage Tracking
Frequency Synchronization
Output Overvoltage Protection
Output Overcurrent Foldback Protection
9mm × 15mm × 5.01mm BGA Package

Product Details

The LTM4647 is a complete 30A output switching mode step-down DC/DC μModule^® (power module) regulator. Included in the package are the switching controller, power FETs, inductor and all supporting components. Operating over an input voltage range of 4.7V to 15V, the LTM4647 supports an output voltage range of 0.6V to 1.8V, set by a single external resistor. Only a few input and output capacitors are needed.

Its high efficiency design delivers 87% efficiency from 12V input to 1.0V output with 30A continuous load current. High switching frequency and a current-mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase operation, N+1 phase redundancy, and output voltage tracking for supply rail sequencing.

Fault protection features include overvoltage and overcurrent protection. The power module is offered in a space saving 9mm × 15mm × 5.01mm BGA package. The LTM4647 is available with SnPb (BGA) or RoHS compliant terminal finish.

Applications

Telecom, Networking and Industrial Equipment
Point of Load Regulation

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 (2)

DC2616A-D

LTM4647 High Efficiency, PolyPhase 120A Step-Down Power μModule Regulator

DC2141A

LTM4647 Demo Board | Buck μModule, 6V ≤ V_IN ≤ 15V or 4.7V ≤ V_IN ≤ 6V, V_OUT = 0.6V to 1.8V @ 30A

DC2616A-D

View Detailed Evaluation Kit Information

Demonstration circuit 2616A-D features a polyphase design using the LTM4647EY, a 30A high efficiency, switch mode step-down power µModule regulator. The input voltage range is from 6V to 15V. To use DC2616A-D for input voltage range from 4.7V to 6V, connect INTV_CC to SV_IN (change R22, R42, R55, R68 from OPT to 0Ω), DRV_CC to V_IN (change R21, R38, R52, R65 from 0Ω to OPT, R2, R39, R53, R66 from OPT to 0Ω). The output voltage range is 0.6V to 1.8V. The DC2616A-D can deliver a nominal 120A output current with four LTM4647 modules in parallel. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulseskipping mode for noise sensitive applications or burst mode operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4647 to synchronize to an external clock signal. The phase shift between two adjacent phases is 90 degrees. DC2616A-D has the option of choosing both internal and external compensation circuit for LTM4647. The LTM4647 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2616A-D.

Resources

DC2141A

View Detailed Evaluation Kit Information

Demonstration circuit 2141A features the LTM4647EY, a 30A high efficiency, switch mode step-down power μModule regulator. The input voltage range is from 6V to 15V. To use DC2141A for input voltage range from 4.7V to 6V, connect INTV_CC to SV_IN (change R22 from OPT to 0Ω), DRVCC to V_IN (change R21 from 0Ω to OPT, R28 from OPT to 0Ω). The output voltage range is 0.6V to 1.8V. Derating is necessary for certain V_IN, V_OUT, frequency and thermal conditions. The DC2141A offers the TRK/SS pin allowing the user to program output tracking or soft-start period. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications.

Resources

Documentation & Resources

Data Sheets

LTM4647: 30A DC/DC Step-Down μModule Regulator Data Sheet
5/22/2017

PDF

1M

Reliability Data

R504 Reliability Data
3/26/2018

PDF

347 K

User Guides

LTM4647 High Efficiency, PolyPhase 120A Step-Down Power µModule Regulator (Rev. 0)
12/19/2018

PDF

767 K
DC2141A - Demo Manual
11/9/2016

PDF

489K

Product Selector Card

Digital Power System Management
4/4/2017

PDF

1M

Informational

μModule Design and Manufacturing Resources
1/30/2018

Press Releases

30A, Scalable to 180A, µModule Regulator in 9mm × 15mm BGA Package
9/30/2021

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice downloads and documentation

LTspice Simulations

LTC4647 Demo Circuit - High Efficiency, PolyPhase Step-Down Power Regulator (6-15V to 1V @ 120A)

LTM4647 Demo Circuit - Single Output, High Current Buck Regulator (6-15V to 1.0V @ 30A)

Models for the following parts are available in LTspice:

LTM4647

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 download and documentation

LTpowerCAD Project Files

LTM4647 Project - Single Output, High Current Buck Regulator (6-15V to 1V @ 30A)

Design tools for the following parts are available in LTpowerCAD:

LTM4647

Product Recommendations

LTM4647 Companion Parts

Recommended Related Parts

LTC2975.

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
LTM4647EY#PBF	Material Declaration	Reliability Data	77-Lead BGA (15mm x 9mm x 5.01mm)	Ultra Librarian SamacSys
LTM4647IY	Material Declaration	Reliability Data	77-Lead BGA (15mm x 9mm x 5.01mm)	Ultra Librarian SamacSys
LTM4647IY#PBF	Material Declaration	Reliability Data	77-Lead BGA (15mm x 9mm x 5.01mm)	Ultra Librarian SamacSys
Wafer Fabrication Data		R504 Reliability Data

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Support & Discussions

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Evaluation Boards

Pricing displayed is based on 1-piece.

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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.