LTM4676

Obsolete

Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management

Data Sheet Product Selection Table

Part Models: 3
1ku List Price: price unavailable

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Part Details

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 V_OUT0)
±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

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

The LTM4676 is a dual 13A or single 26A step-down uModule^® (power module) 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.


Part Number	Turn-on Start-up Time (MAX) (ms)	V_IN Range (V)	V_OUT Range (V)	Pin-compatible
LTM4676	170	4.5 to 26.5	0.5V to 4 (CH0) 0.5 to 5.5 (Both CH)	Yes
LTM4676A	70	4.5 to 17	0.5 to 5.5 (Both CH)	Yes

Applications

System Optimization, Characterization and Data Mining in Prototype, Production and Field Environments
Telecom, Datacom, and Storage Systems

Suggested Replacement Parts

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

Part Models: 3
1ku List Price: price unavailable

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTM4676EY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4676IY	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4676IY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

LTC297x GitHub Linux Driver Source Code

Can't find the software or driver you need?

Hardware Ecosystem

Parts	Product Life Cycle	Description
µModule Buck Regulators 2
LTM4620A	PRODUCTION	Dual 13A or Single 26A DC/DC μModule (Power Module) Regulator
LTM4630	RECOMMENDED FOR NEW DESIGNS	Dual 18A or Single 36A DC/DC μModule (Power Module) Regulator
Digital Power System Managers 1
LTC2977	RECOMMENDED FOR NEW DESIGNS	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement

Parts	Product Life Cycle	Description
LTM4675	RECOMMENDED FOR NEW DESIGNS	Dual 9A or Single 18A μModule Regulator with Digital Power System Management
LTM4676A	RECOMMENDED FOR NEW DESIGNS	Dual 13A or Single 26A μModule Regulator with Digital Power System Management
LTM4677	RECOMMENDED FOR NEW DESIGNS	Dual 18A or Single 36A μModule (Power Module) Regulator with Digital Power System Management

Tools & Simulations

LTspice 7

Models for the following parts are available in LTspice:

LTM4676
LTM4676A

Linduino 4

LTpowerCAD 5

Design tools for the following parts are available in LTpowerCAD:

LTM4676
LTM4676A

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.

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino

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.

Evaluation Kits

LTM4676 Demo Board | Buck µModule, 4.5V ≤ VIN ≤ 16V, VOUT = 1V @ 26A

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Product Details

Demonstration circuit 2087A is a single-output, high efficiency, high density, μModule^®regulator with 4.5V to 16V input range. It can supply 26A maximum load current. The demo board has a LTM4676 μModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676 data sheet for more detailed information.

Resources

DC2087A - Demo Manual
2/10/2014

DC2087A - Design Files
2/10/2014

DC2087A - Schematic
2/10/2014

LTM4676 with DC1613A Demo Kit | LTM4676 (DC1811) with USB-to-PMBus Adapter (DC1613A)

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Product Details

Demonstration circuit 1811B-A is a dual-output, high efficiency, high density, μModule^® regulator with 4.5V to 26.5V input range. Each output can supply 13A maximum load current. The demo board has a LTM4676 μModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676 data sheet for more detailed information.

Resources

DC1811B_ - Schematic
3/2/2015

DC1811B-A - Demo Manual
6/11/2015

DC1811B - Design Files
3/2/2015

DC1613A - Schematic
2/28/2012

DC1613A - Design File
6/25/2010

DC1613A - Demo Manual
6/25/2010

LTM4676 Plug-In Demo Board | 1.5" × 1.2" with Edge Connector, Dual 13A Buck μModule with PMBus, 4.5V ≤ VIN ≤ 26.5V, VOUT0 = 1V @ 13A, VOUT1 = 1.8V @ 13A

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Product Details

Demonstration circuit 2269A-A is a dual-output, high efficiency, high density, μModule^® supply on a small 1.5" × 1.2" PCB board with 4.5V to 26.5V input range. Each output can supply 13A maximum load current. The demo board has a LTM4676 μModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. The DC2269A can be easily inserted to an edge connector for testing and debugging. It has an optional input filter inductor (L1) to further reduce input ripple EMI noise.

Resources

DC2269A - Schematic
5/18/2015

DC2269A-A - Demo Manual
5/18/2015

DC2269A - Design Files
5/18/2015

Reference Designs

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications