LTM4677

RECOMMENDED FOR NEW DESIGNS

Dual 18A or Single 36A μModule (Power Module) Regulator with Digital Power System Management

Data Sheet (Rev. B) Product Selection Table
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Overview

  • Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring
  • Wide Input Voltage Range: 4.5V to 16V
  • Output Voltage Range: 0.5V to 1.8V
  • ±0.5% Maximum DC Output Error Over Temperature
  • ±2.5% Current Readback Accuracy
  • Pin Compatible with LTM4676A (Dual 13A, Single 26A)
  • 400kHz PMBus-Compliant I2C Serial Interface
  • Supports Telemetry Polling Rates up to 125Hz
  • Integrated 16-Bit ΔΣ ADC
  • Constant Frequency Current Mode Control
  • Parallel and Current Share Multiple Modules
  • 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
LTM4677
Dual 18A or Single 36A μModule (Power Module) Regulator with Digital Power System Management
LTM4677 Application Circuit LTM4677 Performance Graph LTM4677 Performance Graph LTM4677 Performance Graph LTM4677 Performance Graph LTM4677 Pin Configuration
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Documentation

Data Sheet 1

User Guide 7

Application Note 7

Technical Articles 3

Informational 1

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
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Tools & Simulations

LTspice 5

Models for the following parts are available in LTspice:

  • LTM4677

Linduino 2

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTM4677

LTpowerPlay®

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

Open Tool
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.

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.

Evaluation Kits

eval board
schematic 1
DC2143A-C

LTM4677 Demo Board | µModule PMBus Buck, LTM4677(x4), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 144A

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Product Details

Demonstration circuit 2143A-C is a high efficiency, high density, μModule regulator with 4.5V to 16V input range. The output voltage is adjustable from 0.5V to 1.8V, and it can supply 144A maximum load current. The demo board has four LTM4677 μModule® regulators, and the LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management. Please see LTM4677 data sheet for more detailed information.

eval board
schematic 2
DC2143A-B

LTM4677 Demo Board | µModule PMBus Buck, LTM4677(x3), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 108A

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Product Details

Demonstration circuit 2143A-B is a high efficiency, high density, μModule regulator with 4.5V to 16V input range. The output voltage is adjustable from 0.5V to 1.8V, and it can supply 108A maximum load current. The demo board has three LTM4677 μModule® regulators, and the LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management. Please see the LTM4677 data sheet for more detailed information.

eval board
schematic 3
DC2481A-A

LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650, 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 86A

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Product Details

Demonstration circuit 2481A-A is a high efficiency, high density, μModule® regulator with 4.5V to 16V input range. The output voltage is adjustable from 0.5V to 1.8V, and it can supply 86A maximum load current. The demo board has 1× LTM4677 and 1× LTM4650 μModule regulators. The LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management, and the LTM4650 is a dual 25A or single 50A step-down regulator. Please see LTM4677 and LTM4650 data sheets for more detailed information.

eval board
schematic 4
DC2143A-A

LTM4677 Demo Board | 2x LTM4677 Buck μModule with Digital PSM, 4.5V ≤ VIN ≤ 20V, VOUT = 0.5V to 1.8V @ 72A

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Product Details

Demonstration circuit 2143A-A is a high efficiency, high density, μModule® regulator with 4.5V to 16V input range. The demo board has two LTM4677 μModule regulators, and the LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management. The demo board output voltage is adjustable from 0.5V to 1.8V, and it can supply 72A maximum load current. Please see LTM4677 data sheet for more detailed information.

eval board
schematic 5
schematic 6
DC2066A

LTM4677EY Demo Board | μModule Regulator With Digital PSM, 4.5V ≤ VIN ≤ 16V, VOUT0 = VOUT1 = 0.5V to 1.8V @ 18A

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Product Details

Demonstration circuit 2066A is a dual-output, high efficiency, high density, μModule regulator with 4.5V to 16V input range. Each output can supply 18A maximum load current and can be programmed for voltages between 0.5V and 1.8V. The demo board has a LTM4677 μModule regulator, which is a dual 18A or single 36A step-down regulator with digital power system management. The LTM4677 features remote configurability and telemetry - monitoring of power management parameters over PMBus (an open standard I2C-based digital interface protocol).

eval board
schematic 7
schematic 8
schematic 9
schematic 10
DC2481A-B

LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650(x3), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 186A

Buy Now View Details

Product Details

Demonstration circuit 2481A-B is a high efficiency, high density, μModule® regulator with 4.5V to 16V input range. The output voltage is adjustable from 0.5V to 1.8V, and it can supply 186A maximum load current. The demo board has 1× LTM4677 and 3× LTM4650 μModule regulators. The LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management, and the LTM4650 is a dual 25A or single 50A step-down regulator. Please see LTM4677 and LTM4650 data sheets for more detailed information.

eval board
schematic 11
DC2204B

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.


 


eval board
schematic 12
schematic 13
DC2481B-A

LTM4677 and LTM4650 Demo Board | Step-Down μModule Regulator with PMBus Power System Management LTM4677 + LTM4650, 86A

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Product Details

Demonstration circuit 2481B-A is a high efficiency, high density, μModule® regulator with 4.5V to 15V input range. The output voltage is adjustable from 0.6V to 1.8V, and it can supply 86A maximum load current. The demo board has 1× LTM4677 and 1× LTM4650 μModule regulators. The LTM4677 is a dual 18A or single 36A step-down regulator with PMBus power system management, and the LTM4650 is a dual 25A or single 50A step-down regulator. Please see LTM4677 and LTM4650 data sheets for more detailed information.

DC2481B-A powers up to default settings and produce 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 Analog Devices 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.

For more details and instructions of LTpowerPlay, please refer to LTpowerPlay Software GUI.
DC2143A-C
LTM4677 Demo Board | µModule PMBus Buck, LTM4677(x4), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 144A
DC2143A-C - Demo Board Image
DC2143A-B
LTM4677 Demo Board | µModule PMBus Buck, LTM4677(x3), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 108A
DC2143A-B - Demo Board Image
DC2481A-A
LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650, 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 86A
DC2481A-A - Demo Board Image
DC2143A-A
LTM4677 Demo Board | 2x LTM4677 Buck μModule with Digital PSM, 4.5V ≤ VIN ≤ 20V, VOUT = 0.5V to 1.8V @ 72A
DC2143A-A - Demo Board Image
DC2066A
LTM4677EY Demo Board | μModule Regulator With Digital PSM, 4.5V ≤ VIN ≤ 16V, VOUT0 = VOUT1 = 0.5V to 1.8V @ 18A
DC2066A - Demo Board Image DC2066A - Schematic
DC2481A-B
LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650(x3), 4.5V ≤ VIN ≤ 16V, VOUT = 0.5V to 1.8V @ 186A
DC2481A-B Demo Board DC2481A-B Demo Board DC2481A-B Demo Board DC2481A-B Demo Board
DC2204B
LTM4675 + LTM4676A + LTM4677 + LTM4620A Demo Board | PSM μModule Power Stick
DC2204B - Demo Board Image
DC2481B-A
LTM4677 and LTM4650 Demo Board | Step-Down μModule Regulator with PMBus Power System Management LTM4677 + LTM4650, 86A
DC2481B-A Image DC2481B-A Board

Reference Designs

Intel Agilex 7 FPGA F-series Transceiver-SoC Development Kit (P-Tile & E-Tile)
Intel Agilex 7 FPGA F-series Transceiver-SoC Development Kit (P-Tile & E-Tile)
Intel Agilex 7 FPGA F-series Transceiver-SoC Development Kit (P-Tile & E-Tile) Circuits from the lab

Altera FPGA

View Detailed Reference Design

Features and Benefits

  • Intel Agilex 7 F-Series devices target a wide range of applications across many markets. This series offers transceiver rates up to 58 Gbps, advanced DSP blocks supporting multiple precisions of fixed-point and floating-point operations, and high-performance crypto blocks.
  • 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.
  • ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. Our team can provide samples and/or evaluation boards for quick validation that can speed time to market in the most complex applications.
  • For a complete list power designs and use cases, please contact your local FAE.
DE10-PRO Stratix 10 Accelerator Circuits from the lab

View Detailed Reference Design

Features and Benefits

  • Stratix® 10 GX/SX FPGA. FPGA Fabric Speed Grade: -2/ XCVR Speed Grade : -1
  • Full-height, 3/4-length form-factor package
  • Allows ultra-low-latency, straight connections to 4 external 100G QSFP28 modules
  • High-speed parallel Flash memory
  • PCIe Gen3 x16
  • With 2x5 timing expansion header for 1pps or other high precision clock inputs
  • 4 independent banks of DDR4 SO-DIMM sockets with error correction code (ECC), up to 8GB@1200MHz for each socket (paired flexibly with Terasic’s 576-Mbit QDR-II+ or 144-Mbit QDR-IV modules)
Arria 10 SoC - Top View
Arria 10 SoC - Top View
Arria 10 SoC - Bottom View
Arria 10 Soc Dev Kit Block Diagram
Arria 10 SoC Power Tree
Altera Arria 10 SoC Development Kit Circuits from the lab

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
Stratix 10 GX PCIE FPGA Development Kit
Stratix 10 GX PCIE FPGA Development Kit
Stratix 10 GX PCIE FPGA Development Kit Block Diagram
Stratix 10 GX PCIE FPGA Development Kit (Recommended Simplified Power Tree: 12Vin to required I/O voltages)
Stratix 10 GX PCIE FPGA Development Kit (Actual Power Tree representative of components used on board)
Intel Stratix 10 FPGA PCIe Development Kit Circuits from the lab

View Detailed Reference Design

Features and Benefits

  • Analog Devices has worked closely with Intel PSG to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • The validated power solutions include uModules power products that address time and space constraints while delivering high efficiency, reliability, and low noise.
  • The actual power tree represents the best solution at time of design.
  • A recommended power tree has also been included to present the ideal solution at time of Stratix 10 GX PCIe development kit release. An updated alternate version of the power tree represents the latest solutions available from Analog Devices. For many applications, an intermediate rail is not ideal, so recommendations an alternate power tree that allow for direct power conversion from 12V input is provided below.
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Block Diagram
Stratix 10 GX Signal Integrity Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit (updated alternate Simplified Power Tree: 12Vin to required I/O voltages)
Stratix 10 GX Signal Integrity Development Kit Circuits from the lab

View Detailed Reference Design

Features and Benefits

  • Analog Devices has worked closely with Intel PSG to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • The validated power solutions include uModules power products that address time and space constraints while delivering high efficiency, reliability, and low noise.
  • The actual power tree represents the best solution at time of design.
  • A recommended power tree has also been included to present the ideal solution at time of Stratix 10 GX SI development kit release. An updated alternate version of the power tree represents the latest solutions available from Analog Devices. For many applications, an intermediate rail is not ideal, so recommendations for an alternate power tree that allows for direct power conversion from 12V input is provided below.
Intel Agilex 7 FPGA F-series Transceiver-SoC Development Kit (P-Tile & E-Tile)
Altera FPGA
Intel Agilex 7 FPGA F-series Transceiver-SoC Development Kit (P-Tile & E-Tile)
DE10-PRO Stratix 10 Accelerator
Altera Arria 10 SoC Development Kit
Arria 10 SoC - Top View
Arria 10 SoC - Bottom View
Arria 10 Soc Dev Kit Block Diagram
Arria 10 SoC Power Tree
Intel Stratix 10 FPGA PCIe Development Kit
Stratix 10 GX PCIE FPGA Development Kit
Stratix 10 GX PCIE FPGA Development Kit Block Diagram
Stratix 10 GX PCIE FPGA Development Kit (Recommended Simplified Power Tree: 12Vin to required I/O voltages)
Stratix 10 GX PCIE FPGA Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Block Diagram
Stratix 10 GX Signal Integrity Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit (updated alternate Simplified Power Tree: 12Vin to required I/O voltages)

Latest Discussions

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single output ltpowercad model for ltm4677
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Regarding output fluctuations with and without load
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