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Features and Benefits
- 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
- UVLO, Overvoltage Shutdown and Latchoff Thresholds
- N-Channel Overvoltage Power-Interrupt MOSFET Driver
- Surge Stopper Capable with Few External Components
- Robust, Resettable Latchoff Overvoltage Protection
- N-Channel Overvoltage Crowbar Power MOSFET Driver
The LTM4641 is a switch mode step-down DC/DC μModule® (power module) 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.
- Ruggedized Electronics
- Avionics and Industrial Equipment
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Demonstration circuit 1543B features the LTM4641, a high efficiency, high density switch mode step-down power μModule regulator with superior input and load protection features. The input voltage range is from 4.5V to 38V. The output voltage is jumper programmable from 0.8V to 6V with a rated load current of 10A. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. DC1543B offers the TRACK/SS pin allowing the user to program output tracking or soft-start period. The DC1543B allows the user to enable/disable input undervoltage protection; input latching/non-latching overvoltage protection; and latching/non-latching overtemperature protection.
Higher efficiency at low load currents is achieved by setting the MODE pin jumper to DCM. The LTM4641 data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit 1543B.
This evaluation board is obsolete and no longer recommended. The replacement board is the DC1543B.
Demonstration circuit 1543A features the LTM4641, a high efficiency, high density switch mode step-down power µModule regulator with superior input and load protection features. The input voltage range is from 4.5V to 38V. The output voltage is jumper programmable from 0.8V to 6V with a rated load current of 10A. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
Design tools for the following parts are available in LTpowerCAD:
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.