LTM4641 - 38V, 10A DC/DC µModule Regulator with Advanced Input and Load Protection

Features

  • Wide Operating Input Voltage Range: 4.5V to 38V
  • 10A DC Typical, 12A Peak Output Current
  • Output Range: 0.6V to 6V
  • ±1.5% Maximum Total Output DC Voltage Error
  • Differential Remote Sense Amplifier for POL Regulation
  • Internal Temperature, Analog Indicator Output
  • Overcurrent Foldback and Overtemperature Protection
  • Current Mode Control/Fast Transient Response
  • Parallelable for Higher Output Current
  • Selectable Pulse-Skipping Operation
  • Soft-Start/Voltage Tracking/Pre-Bias Start-Up
  • 15mm × 15mm × 5.01mm BGA Package
  • SnPb or RoHS Compliant Finish

 Input Protection

  • UVLO, Overvoltage Shutdown and Latchoff Thresholds
  • N-Channel Overvoltage Power-Interrupt MOSFET Driver
  • Surge Stopper Capable with Few External Components

   Load Protection

  • Robust, Resettable Latchoff Overvoltage Protection
  • N-Channel Overvoltage Crowbar Power MOSFET Driver

Typical Application

LTM4641 Typical Application
LTM4641 Typical Application

Description

The LTM®4641 is a switch mode step-down DC/DC μModule® (micromodule) regulator with advanced input and load protection features. Trip detection thresholds for the following faults are customizable: input undervoltage, overtemperature, input overvoltage and output overvoltage. Select fault conditions can be set for latchoff or hysteretic restart response—or disabled. Included in the package are the switching controller and housekeeping ICs, power MOSFETs, inductor, overvoltage drivers, biasing circuitry and supporting components. Operating from input voltages of 4V to 38V (4.5V start-up), the device supports output voltages from 0.6V to 6V, set by an external resistor network remote sensing the point-of-load’s voltage.

The LTM4641’s high efficiency design can deliver up to 10A continuous current with a few input and output capacitors. The regulator’s constant on-time current mode control architecture enables high step-down ratios and fast response to transient line and load changes. The LTM4641 is offered in a 15mm × 15mm × 5.01mm with SnPb or RoHS compliant terminal finish.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

For complete and up to date package information and drawings, please refer to our packaging page

15mm x 15mm x 5.01mm BGA

LTM4641 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM4641EY#PBF BGA 144 E $37.07 $25.95 View
LTM4641IY#PBF BGA 144 I $40.79 $28.55 View
LTM4641MPY#PBF BGA 144 MP $66.73 $46.71 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1543A LTM4641 Demo Board | Buck uModule Regulator, Input and Load Protection, 4.5V ≤ VIN ≤ 38V, Vout = 0.6V to 6V @ 10A $65.00
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Click here to view our complete list of demo boards

Applications

  • Ruggedized Electronics
  • Avionics and Industrial Equipment

Product Notifications

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Design Tools

LTpowerCAD

The LTpowerCAD II design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:
LTM4641

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTM4641

Technical Support