LTM4642
Info : RECOMMENDED FOR NEW DESIGNS
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LTM4642

20VIN, Dual 4A or Single 8A DC/DC μModule Regulator

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 3
1ku List Price Starting From $18.83
Features
  • Small Form Factor Dual 4A Power Supply
  • Wide Input Voltage Range: 4.5V to 20V (2.375V Min with CPWR Bias)
  • Dual 180° Out-of-Phase Outputs with 4A DC
  • Dual Outputs with 0.6V to 5.5V Range
  • Output Voltage Tracking
  • ±1.5% Maximum Total DC Output Voltage Error
  • Up to 95% Maximum Efficiency
  • Phase-Lockable Fixed Frequency 600kHz to 1.4MHz
  • Constant On-Time, Valley Current Mode Architecture
  • Selectable Burst Mode® Operation
  • Output Overvoltage and Overcurrent Protection
  • 9mm × 11.25mm × 4.92mm BGA Package
Additional Details
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The LTM4642 is a complete dual 4A or single 8A step-down DC/DC μModule® (micromodule) regulator. Included in the package are the switching controller, power FETs, inductor, and all support components. Operating over input voltage ranges of 4.5V to 20V, (2.375V min with external CPWR bias), the LTM4642 supports two outputs with voltage ranges of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 4A continuous current (5A peak) for each output.

High switching frequency and a valley current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The two outputs are interleaved with 180° phase to minimize the ripple noise and reduce the I/O capacitors.

The power module is offered in a 9mm × 11.25mm × 4.92mm BGA package. The LTM4642 is RoHS compliant with Pb-free finish.

Applications

  • Telecom and Networking Equipment
  • Servers
  • FPGA Power
Part Models 3
1ku List Price Starting From $18.83

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTM4642EY#PBF
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LTM4642IY
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LTM4642IY#PBF
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Product Lifecycle

PCN

Jul 21, 2021

- 21_0159

Ink Mark to Laser Mark Conversion for µModule

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Feb 28, 2020

- 20_0123

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

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Jul 23, 2019

- 19_0171

Notification of qualification of a new mold compound for the LTM4642 µModule Regulator   

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Mar 13, 2019

- 19_0035

Notification of Additional Assembly Location, ASE Korea for LTM4642

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jul 21, 2021

- 21_0159

arrow down

Ink Mark to Laser Mark Conversion for µModule

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Feb 28, 2020

- 20_0123

arrow down

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

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Jul 23, 2019

- 19_0171

arrow down

Notification of qualification of a new mold compound for the LTM4642 µModule Regulator   

LTM4642EY#PBF

PRODUCTION

LTM4642IY

PRODUCTION

LTM4642IY#PBF

PRODUCTION

Mar 13, 2019

- 19_0035

arrow down

Notification of Additional Assembly Location, ASE Korea for LTM4642

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2194A

LTM4642 Demo Board | Dual Buck μModule Regulator, 2.5V ≤ VIN ≤ 20VIN, VOUT1 = 1.8V @ 4A, VOUT2 = 1.2V @ 4A

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DC2194A

LTM4642 Demo Board | Dual Buck μModule Regulator, 2.5V ≤ VIN ≤ 20VIN, VOUT1 = 1.8V @ 4A, VOUT2 = 1.2V @ 4A

LTM4642 Demo Board | Dual Buck μModule Regulator, 2.5V ≤ VIN ≤ 20VIN, VOUT1 = 1.8V @ 4A, VOUT2 = 1.2V @ 4A

Product Detail

Demonstration circuit of DC2194A features the LTM4642IY, the wide input voltage, high efficiency and power density, dual 4A or single 8A DC/DC step-down μModule regulator. The step-down regulator operates from an input voltage range of 4.5V to 20V (or 2.5V min. with 5V external bias voltage at CPWR) and provides an adjustable output voltage range from 0.6V to 5V at 4A load current per channel. The part is capable of operating in dual phase single output, delivers up to 8A load current with interleaved two phases at 180 degrees. Differential output voltage sensing is available on Channel 1 for applications requiring more accurate output load regulation. A user-selectable mode input is provided to allow users to trade off ripple noise for light load efficiency: Discontinuous Mode (DCM) of operation delivers higher efficiency at light load while Continuous Conduction Mode (CCM) is preferred for noise sensitive applications.


 


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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Reference Designs

Reference Designs 1

Stratix 10 GX PCIE FPGA Development Kit

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

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

Circuits from the lab

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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.
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