LTM4676A

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. B) Product Selection Table

Part Models: 3
1ku List Price: Starting From $39.96

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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 5.5V
±0.5% 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
Supports Telemetry Polling Rates Up to 125Hz
Constant Frequency Current Mode Control
Parallel and Current Share Multiple Modules
All 7-Bit Slave Addresses Supported
Pin-Compatible to Dual 18A LTM4677
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 with ECC

Writable Data and Configurable Parameters:

Output Voltage, Voltage Sequencing and Margining
Digital Soft-Start/Stop Ramp
OV/UV/OT, UVLO, Frequency and Phasing

The LTM4676A is a dual 13A or single 26A step-down µModule^® (micromodule) DC/DC regulator with 40ms turn-on time. It features remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I²C-based digital interface protocol . The LTM4676A is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components.

The LTM4676A’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. 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 LTM4676A is pin-compatible and the improved performance version of the LTM4676.


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

Part Models: 3
1ku List Price: Starting From $39.96

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
LTM4676AEY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4676AIY	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4676AIY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 21, 2021 - 21_0159 Ink Mark to Laser Mark Conversion for µModule
		PCN21_0159_Form Material_Report Delta Qualification Matrix
LTM4676AEY#PBF	PRODUCTION
LTM4676AIY	PRODUCTION
LTM4676AIY#PBF	PRODUCTION
Feb 28, 2020 - 20_0123 Micro-Module, Test Site Transfer from Analog Devices Singapore to Analog Devices Penang, Malaysia
		PCN20_0123_Form Material_Report Test Correlation Report Other Qualification Results Summary
LTM4676AEY#PBF	PRODUCTION
LTM4676AIY	PRODUCTION
LTM4676AIY#PBF	PRODUCTION
Feb 5, 2020 - 20_0127 Supplier Material Change for µModule
		PCN20_0127_Form Material_Report Qualification Results Summary
LTM4676AEY#PBF	PRODUCTION
LTM4676AIY	PRODUCTION
LTM4676AIY#PBF	PRODUCTION
Sep 30, 2019 - 19_0217 LTM4676A - Notification of Qualification of New Mold Compound
		PCN19_0217_Form Material_Report Qualification Results Summary
LTM4676AEY#PBF	PRODUCTION
LTM4676AIY	PRODUCTION
LTM4676AIY#PBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2975	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement

Parts	Product Life Cycle	Description
LTM4675	RECOMMENDED FOR NEW DESIGNS	Dual 9A or Single 18A μModule Regulator with Digital Power System Management
LTM4676	Obsolete	Dual 13A or Single 26A μModule (Power Module) 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 1

LTM4676A - Step-Down (Buck) Regulators

Models for the following parts are available in LTspice:

LTM4676
LTM4676A

LTpowerCAD 2

LTpowerPlay®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

Open Tool

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.

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

LTM4675 + LTM4676A + LTM4677 + LTM4620A Demo Board | PSM μModule Power Stick

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Product Details

Demonstration circuit 2204B is a very compact demo board that showcases five different devices – LTM4675, LTM4676A, LTM4677, LTM4620A and LTC2974. These devices cover various product lines including DC/DC μModule^® regulator with digital power system management (LTM4675, LTM4676A and LTM4677), high current analog DC/DC μModule regulator (LTM4620A) and I²C/SMBus/PMBus power system managers with EEPROM (LTC2974). Please see data sheets for more detailed information.

Resources

DC2204B - Demo Manual
1.00M

DC2204B - Schematic
168.00K

DC2204B - Design Files
3.00M

LTM4676A Demo Board | LTM4676A(x2) Current Shared, PMBus Buck µModule, 4.5V ≤ VIN ≤ 17V, VOUT = 0.5V to 4V @ 50A

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Product Details

Demonstration circuit 1989B-A is a high efficiency, high density, μModule regulator with 4.5V to 17V input range. The output voltage is adjustable from 0.5V to 4V, and it can supply 50A maximum load current. The demo board has two LTM4676A μModule regulators, and the LTM4676A is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676A data sheet for more detailed information.

Resources

DC1989B-A - Demo Manual
1.00M

DC1989B-A - Design Files
3.00M

DC1989B-A - Schematic
172.00K

LTM4676A Demo Board | LTM4676A(x3) Current Shared, PMBus Buck µModule, 4.5V ≤ VIN ≤ 17V, VOUT = 0.5V to 4V @ 75A

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Product Details

Demonstration circuit 1989B-B is a high efficiency, high density, μModule regulator with 4.5V to 17V input range. The output voltage is adjustable from 0.5V to 4V, and it can supply 75A maximum load current. The demo board has three LTM4676A μModule regulators, and the LTM4676A is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676A data sheet for more detailed information.

Resources

DC1989B-B - Demo Manual
1.00M

DC1989B-B - Schematic
172.00K

DC1989B-B - Design Files
4.00M

LTM4676A Demo Board | LTM4676A(x4) Current Shared, PMBus Buck µModule, 4.5V ≤ VIN ≤ 17V, VOUT = 0.5V to 4V @ 100A

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Product Details

Demonstration circuit 1989B-C is a high efficiency, high density, μModule regulator with 4.5V to 17V input range. The output voltage is adjustable from 0.5V to 4V, and it can supply 100A maximum load current. The demo board has four LTM4676A μModule regulators. The LTM4676A is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676A data sheet for more detailed information.

Resources

DC1989B-C - Demo Manual
1.00M

DC1989B-C - Schematic
172.00K

DC1989B-C - Design Files
2.00M

LTM4676A Demo Board | Step-Down μModule Regulator with PMBus, 4.5V ≤ VIN ≤ 17V, VOUT0 = 1V @ 13A, VOUT1 = 1.8V @ 13A

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Product Details

Demonstration circuit 1811B-B 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 LTM4676A µModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676A data sheet for more detailed information.

The DC1811B-B powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay^® onto your PC and use ADI’s I²C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

Resources

DC1811B - Schematic
94.00K

DC1811B-B - Design Files
1.00M

DC1811B-B - Demo Manual (Rev.A)
2.00M

LTM4676AEY/LTM4630EV Demo Board | PMBus Buck µModule (LTM4676A) + LTM4630 (x3), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 130A

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Product Details

Demonstration circuit 2106B-B is a high efficiency, high density, paralleled, multi-chip μModule regulator solution with a 4.5V to 16V input range and 130A of output current. The output voltage (1V default value) is adjustable from 0.5V to 1.8V. The demo board has 1× LTM4676A acting as the master controller, and 3× LTM4630 μModule slave controllers. All devices having their outputs paralleled to provide 130A of current. Please see the LTM4676A and LTM4630 data sheets for more detailed information.

Resources

DC2106B-B - Schematic
175.00K

DC2106B-B - Design Files
2.00M

DC2106B-B - Demo Manual
1.00M

Reference Designs

Monolithic Power Tree Solution for the ZU7 FPGA

Zynq UltraScale+ MPSoC ZCU104 Paper Reference Design

View Detailed Reference Design

Features and Benefits

The ZCU104 Evaluation Kit enables designers to jumpstart designs for embedded vision applications such as surveillance, Advanced Driver Assisted Systems (ADAS), machine vision, Augmented Reality (AR), drones and medical imaging.

The ADI Power delivery solutions support multiple reference designs using DC/DC module and monolithic solutions. ADI offers several options for powering the Zu7 FPGA.

Our module-based solutions combine a small footprint, while maximizing efficiency and tight regulation. Our monolithic based solutions support a lower cost optimized power delivery solution for mass production.