LTM4638
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LTM4638

20VIN, 15A Step-Down DC/DC µModule Regulator

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 3
1ku List Price Starting From $16.24
Features
  • Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
  • 6.25mm × 6.25mm × 5.02mm BGA Package
  • Wide Input Voltage Range: 3.1V to 20V
  • 0.6V to 5.5V Output Voltage
  • 15A 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 LTM4638s
  • Output Voltage Tracking
  • Selectable Discontinuous Mode
  • Power Good Indicator
  • Overvoltage, Overcurrent and Overtemperature Protection
Additional Details
show more Icon

The LTM4638 is a complete 15A step-down switching mode µModule (power module) regulator in a tiny 6.25mm × 6.25mm × 5.02mm BGA package. Included in the package are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of 3.1V to 20V, the LTM4638 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers up to 15A continuous output current. Only bulk input and output capacitors are needed.

The LTM4638 supports selectable discontinuous mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage, overcurrent and overtemperature protection.

The LTM4638 is available with SnPb or RoHS compliant terminal finish.

APPLICATIONS

  • Telecom, Datacom, Networking and Industrial Equipment
  • Medical Diagnostic Equipment
  • Data Storage Rack Units and Cards
  • Test and Debug Systems
Part Models 3
1ku List Price Starting From $16.24

close icon
Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTM4638EY#PBF
  • HTML
  • HTML
LTM4638IY
  • HTML
  • HTML
LTM4638IY#PBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Sep 13, 2022

- 22_0193

Laser Top Mark Conversion for uModule COP and TMSV_COP Packages

LTM4638EY#PBF

PRODUCTION

LTM4638IY

PRODUCTION

LTM4638IY#PBF

PRODUCTION

Feb 28, 2020

- 20_0123

Micro-Module, Test Site Transfer from Analog Devices Singapore to Analog Devices Penang, Malaysia

LTM4638EY#PBF

PRODUCTION

LTM4638IY

PRODUCTION

LTM4638IY#PBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Sep 13, 2022

- 22_0193

arrow down

Laser Top Mark Conversion for uModule COP and TMSV_COP Packages

LTM4638EY#PBF

PRODUCTION

LTM4638IY

PRODUCTION

LTM4638IY#PBF

PRODUCTION

Feb 28, 2020

- 20_0123

arrow down

Micro-Module, Test Site Transfer from Analog Devices Singapore to Analog Devices Penang, Malaysia

LTM4638EY#PBF

PRODUCTION

LTM4638IY

PRODUCTION

LTM4638IY#PBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC2665B-B

LTM4638 | 20VIN, 15A Step-Down μModule Regulator

zoom

DC2665B-B

LTM4638 | 20VIN, 15A Step-Down μModule Regulator

LTM4638 | 20VIN, 15A Step-Down μModule Regulator

Product Detail

Demonstration circuit 2665B-B features the LTM4638 μModule® regulator, a high performance, high efficiency step-down regulator. The LTM4638 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm × 6.25mm × 5.02mm BGA package. The LTM4638 has an operating input voltage range of 3.1V to 20V and provides an output current up to 15A. 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 discontinuous current mode (DCM) operation using the MODE jumper (JP7) in less noise sensitive applications. Refer to the LTM4638 data sheet in conjunction with the demo manual for working on or modifying the DC2665B-B.
reference details image

DC2665A-B

OBSOLETE: LTM4638 | 20VIN, 15A Step-Down µModule Regulator

zoom

DC2665A-B

OBSOLETE: LTM4638 | 20VIN, 15A Step-Down µModule Regulator

OBSOLETE: LTM4638 | 20VIN, 15A Step-Down µModule Regulator

Product Detail

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

Demonstration circuit 2665A-B features the LTM4638 µModule® regulator, a high performance, high efficiency step-down regulator. The LTM4638 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm × 6.25mm × 5.02mm BGA package. The LTM4638 has an operating input voltage range of 3.1V to 20V and provides an output current up to 15A. 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 LTM4638 data sheet must be read in conjunction with this demo manual for working on or modifying DC2665A-B.

Tools & Simulations

Tools & Simulations 2

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.

Reference Designs

Reference Designs 4

Stratix 10 GX PCIE FPGA Development Kit

zoomopens a dialog

intel-stratix-10-fpga-pcie-development-kit

intel-stratix-10-fpga-pcie-development-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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.
View Detailed Reference Design external link
Stratix 10 GX Signal Integrity Development Kit

zoomopens a dialog

intel-stratix-10-SI-fpga-development-kit

intel-stratix-10-SI-fpga-development-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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.
View Detailed Reference Design external link
Xilinx VU37P Board

zoomopens a dialog
htg-937

Circuits from the lab

tooltip Info:Circuits from the lab

Features and Benefits

The HTG-937 provides access to large FPGA gate density and 8GB/16GB of high bandwidth memory. It is populated with the Xilinx Zynq Virtex Ultrascale VU37P, or VU47P. Analog Devices power solution on this platform is fully validated to meet the requirements of Xilinx Zynq Virtex Ultrascale FPGAs to ensure a robust power delivery solution.

DC/DC μModule regulators are used on the HTG-937 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.

We provide supporting documentation including power schematics, layout, LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly.

View Detailed Reference Design external link
HTG-AI & Prime PCIe Express Platform - Top View

Versal PRIME /AI PCI Express Platform

zoomopens a dialog

HTG-VSL1

Versal PRIME /AI PCI Express Platform

HTG-VSL1

Circuits from the lab

tooltip Info:Circuits from the lab
Versal PRIME /AI PCI Express Platform

Features and Benefits

  • Xilinx Versal AI Core and Prime series solves a broad range of industry-specific problems with performance and flexibility. Core use cases  include storage acceleration,  data center network acceleration, 5G xHaul and Passive optical networks.

  • The HTG-VSL1 AI Core and Prime PCIe express platform allows easy and versatile functional expansion through two Vita 57.4 compliant High-Pin-Count  FMC+ ports and one high-speed AcceleRate® port.

  • Analog Devices, Inc. supports power delivery solutions for the HTG-VSL1 for the Versal AI Core and Versal Prime PCIe express platform. DC/DC μModule regulators are used on the HTG-VSL1 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.

  • ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files 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.

  • Key Power DC DC Modules include:
    • LTM4700 is a Dual 50A or Single 100A μModule Regulator with Digital Power System Management, PMBus
    • LTM4638 is a 15A Step-Down DC/DC μModule Regulator
    • LTM4625 is a 5A Step-Down DC/DC μModule Regulator
    • LTM4632 is a Triple Output, Step-Down μModule Regulator for DDR-QDR4 Memory
    • LTC2937 is a Programmable Six Channel Sequencer and Voltage Supervisor with EEPROM
View Detailed Reference Design external link

Recently Viewed