LTM4657

RECOMMENDED FOR NEW DESIGNS

20VIN, 8A Step-Down DC/DC µModule Regulator

Data Sheet (Rev. C) Product Selection Table
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Overview

  • Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
  • 6.25mm × 6.25mm × 3.87mm BGA Package
  • Wide Input Voltage Range: 3.1V to 20V
  • 0.5V to 5.5V Output Voltage
  • 8A DC Output Current
  • ±1.5% Maximum Total DC Output Voltage Error Over Line, Load and Temperature
  • Differential Remote Sensing Amp
  • Current Mode Control, Fast Transient Response
  • External Frequency Synchronization
  • Multiphase Parallel Current Sharing with Multiple LTM4657s
  • Output Voltage Tracking
  • Selectable Discontinuous Mode
  • Power Good Indicator
  • Overvoltage, Overcurrent and Overtemperature Protection
  • Pin Compatible with LTM4626(12A) and LTM4638(15A)
LTM4657
20VIN, 8A Step-Down DC/DC µModule Regulator
LTM4657 Application Circuit LTM4657 Pin Configuration LTM4657 Performance Graph
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Documentation

Data Sheet 1

User Guide 1

Design Note 1

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTM4657

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTM4657
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
DC2665B-C

LTM4657 | 20VIN, 8A Step-Down μModule Regulator

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Product Details

Demonstration circuit 2665B-C features the LTM4657 μModule® regulator, a high performance, high efficiency step-down regulator. The LTM4657 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm × 6.25mm × 3.87mm BGA package. The LTM4657 has an operating input voltage range of 3.1V to 20V and provides an output current up to 8A. The output voltage is programmable from 0.5V to 5.5V and can be remotely sensed. The stacked inductor design improves thermal dissipation and significantly reduces the package area. Output voltage tracking is available through the TRACK/ SS pin for supply rail sequencing. External clock synchronization is available through the SYNC/MODE pin. For high efficiency at low load currents, select discontinuous current mode (DCM) operation using the MODE jumper (JP7) in less noise sensitive applications. Refer to the LTM4657 data sheet in conjunction with the demo manual for working on or modifying DC2665B-C.

eval board
schematic 2
DC2989A

OBSOLETE: LTM4657 Demo Board | 20VIN, 8A Step-Down µModule® Regulator 

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Product Details

This evaluation board is obsolete and no longer recommended. The replacement board is the DC2665B-C.

Demonstration circuit 2989A features the LTM4657 µModule® regulator, a high performance, high efficiency step-down regulator. The LTM4657 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm x 6.25mm x 3.87mm BGA package. The LTM4657 has an operating input voltage range of 3.1V to 20V and provides an output current up to 8A. The output voltage is programmable from 0.6V to 5.5V and can be remotely sensed. The stacked inductor design improves thermal dissipation and significantly reduces the package area.

Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing. External clock synchronization is available through the SYNC/MODE pin. For high efficiency at low load currents, select DCM mode operation using the MODE jumper (JP7) in less noise sensitive applications. The LTM4657 data sheet must be read in conjunction with this demo manual for working on or modifying DC2989A. 
DC2665B-C
LTM4657 | 20VIN, 8A Step-Down μModule Regulator
DC2665B-C Evaluation Board - Top View
DC2989A
OBSOLETE: LTM4657 Demo Board | 20VIN, 8A Step-Down µModule® Regulator 
DC2989A-acl

Reference Designs

agilex7 alternative umodule
agilex7 alternative umodule
Intel Agilex 7 FPGA F-series Development Kit (Alternative µModule) 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.
Intel Agilex 7 FPGA F-series Development Kit (P-Tile and E-Tile) Power Tree
Intel Agilex 7 FPGA F-series Development Kit (P-Tile and E-Tile) Power Tree
Intel Agilex 7 FPGA F-series Development Kit (P-Tile and 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.
Monolithic Power Tree Solution for the ZU7 FPGA
Monolithic Power Tree Solution for the ZU7 FPGA
uModule Power Tree for the ZU7 FPGA 
ZCU104 Circuits from the lab

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.

  • ADI provides supporting documentation to enable you to validate the power solution for your application seamlessly.

  • For a complete list power designs and use cases, please contact your local FAE.

  • Please refer to the circuit descriptions below that best support your design.
Intel Agilex 7 FPGA F-series Development Kit (Alternative µModule)
Altera FPGA
agilex7 alternative umodule
Intel Agilex 7 FPGA F-series Development Kit (P-Tile and E-Tile)
Altera FPGA
Intel Agilex 7 FPGA F-series Development Kit (P-Tile and E-Tile) Power Tree
ZCU104
Zynq UltraScale+ MPSoC ZCU104 Paper Reference Design
Monolithic Power Tree Solution for the ZU7 FPGA
uModule Power Tree for the ZU7 FPGA 

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