LTM4636-1

40A μModule Regulator with Overvoltage/Overtemperature Protection

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LTM4636

40A DC/DC μModule Regulator

Overview

Features and Benefits
Product Details

Features and Benefits

Overtemperature, Input/Output Overvoltage Protection
Trips Upstream Power Source or Circuit Breaker
Stacked Inductor Acts as Heat Sink
Wide Input Voltage Range: 4.7V to 15V
0.6V to 3.3V Output Voltage Range
±1.3% Total DC Output Voltage Error (–40°C to 125°C)
Differential Remote Sense Amplifier for Precision Regulation
Current Mode Control/Fast Transient Response
Frequency Synchronization
Parallel Current Sharing (Up to 240A)
88% Efficiency (12V_IN, 1V_OUT) at 40A
Overcurrent Foldback Protection
Overtemperature Shutdown
16mm × 16mm × 7.07mm BGA Package

Product Details

The LTM4636-1 is a 40A step-down μModule^® (power module) switching regulator with stacked inductor as a heat sink for heat dissipation and cooler operation in a small package. The LTM4636-1 detects overtemperature and input/output overvoltage conditions and can trip an upstream power supply or circuit breaker to protect itself and its load. The exposed inductor as a heat sink permits direct contact with airflow from any direction. The LTM4636-1 can deliver 40W (12V_IN, 1V_OUT, 40A, 200LFM) with only 40°C rise over the ambient temperature. Full-power 40W is delivered up to 83°C ambient and half-power 20W is supported at 110°C ambient.

The LTM4636-1 operates at 92%, 90% and 88% efficiency delivering 15A, 30A and 40A, respectively, to a 1V load (12V_IN). The μModule regulator is scalable where four in current sharing deliver 160W with only 40°C rise and 88% efficiency (12V_IN, 1V_OUT, 400LFM). The LTM4636-1 is offered in 16mm × 16mm × 7.07mm BGA package.


	Notes
LTM4636	Simpler circuits and fewer features
LTM4636-1	Extra internal circuitry for detecting overtemperature and input/output overvoltage conditions

APPLICATIONS

Telecom Servers and Networking Equipment
Industrial Equipment and Medical Systems

Product Categories

Power Management
- µModule Buck Regulators

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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)

DC2230A-B

LTM4636-1 Demo Board | Buck µModule Regulator with Overvoltage/Temperature Protection, Stacked Inductor; 4.7V ≤ V_IN ≤ 15V, V_OUT = 1V @ 40A

DC2448A-D

LTM4636-1PolyPhase 160A Step-Down Power µModule Regulator with Overvoltage and Overtemperature Protection

DC2230A-B

View Detailed Evaluation Kit Information

Demonstration circuit 2230A-B features the LTM4636-1EY, a 40A high efficiency, switch mode step-down power μModule^® regulator with overtemperature and input/output overvoltage protection. The input voltage range is from 4.7V to 15V. For a 4.7V to 5.5V input voltage range, short PV_CC pin to the V_IN pin with R8 = R21 = 0Ω and remove R17. The output voltage range is 0.6V to 3.3V. Derating is necessary for certain V_IN, V_OUT, frequency and thermal conditions. The board operates in continuous conduction mode with heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM463-16 to synchronize to an external clock signal. DC2230A-B has the option of choosing either internal or external compensation circuit for the LTM4636-1. Tying the PHASMD pin to a different voltage generates a certain phase difference between the MODE_PLLIN and CLKOUT pins. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2230A-B.

Resources

DC2448A-D

View Detailed Evaluation Kit Information

Demonstration circuit DC2448A-D features a PolyPhase^® design using the LTM4636-1EY, a 40A high efficiency, switch mode step-down power µModule^® regulator with overvoltage and overtemperature protection features. The input voltage range is from 9V to 15V. The output voltage range is 0.6V to 3.3V. The DC2448A-D can deliver a nominal 160A output current. DC2448A-D has on-boardhot swap circuit that can disconnect input supply and protect the LTM4636-1 and the load under overvoltage and overtemperature conditions. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT and thermal conditions. The board operates in continuous conduction mode in heavy load conditions.

For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4636-1 to synchronize to an external clock signal. DC2448A-D has the option of choosing both internal and external compensation circuits for LTM4636-1. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2448A-D.

Resources

Documentation & Resources

Data Sheets

LTM4636-1: 40A μModule Regulator with Overvoltage/ Overtemperature Protection Data Sheet (Rev. B)
3/29/2023

PDF

4 M

Reliability Data

R583 Reliability Data
3/26/2018

PDF

345 K

User Guides

DC2230A-B - Demo Manual
2/15/2017

PDF

628K

Informational

μModule Design and Manufacturing Resources
1/30/2018

Press Releases

40A Scalable µModule Regulator Protects Load by Tripping Upstream Power Source
9/13/2021

Technical Articles

How to Choose Cool Running, High Power, Scalable POL Regulators and Save Board Space
11/6/2017 Analog Dialogue

Tools & Simulations

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.

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.

LTspice downloads and documentation

LTspice Simulations

LTM4636-1 Demo Circuit - High Efficiency, PolyPhase 160A Step-Down Power μModule Regulator (4.7-15V to 0.9V @ 160A)

LTM4636-1 Demo Circuit - High Current Step-Down Regulator (4.7-15V to 1V @ 40A)

Models for the following parts are available in LTspice:

LTM4636

LTM4636-1

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.

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.

LTpowerCAD download and documentation

LTpowerCAD Project Files

LTM4636-1 Project - High Current Step-Down uModule Regulator (6-15V to 1V @ 40A)

Design tools for the following parts are available in LTpowerCAD:

LTM4636

LTM4636-1

Product Recommendations

LTM4636-1 Companion Parts

Recommended Related Parts

LTC2975, LTC4218.

Design Resources

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.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTM4636EY-1#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 7.07mm)	Ultra Librarian SamacSys
LTM4636IY-1#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 7.07mm)	Ultra Librarian SamacSys
Wafer Fabrication Data		R583 Reliability Data

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Support & Discussions

LTM4636-1 Discussions

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.