LTM8040

PRODUCTION

LTM8040

36V, 1A μModule (Power Module) LED Driver and Current Source

PRODUCTION

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1ku List Price Starting From $8.77

Features

True Color PWM^™ Delivers Constant Color with 250:1 Dimming Ratio
Wide Input Range: 4V to 36V
Up to 1A LED Current
Adjustable Control of LED Current
High Output Current Accuracy is Maintained Over a Wide Range from 35mA to 1A
Open LED and Short-Circuit Protection
Grounded LED Cathode Connection
Small Footprint (15mm × 9mm × 4.32mm) Surface Mount LGA Package

Additional Details

The LTM8040 is a fixed frequency 1A step-down DC/DC μModule^® (power module) regulator designed to operate as a constant current source. Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA to 1A, allowing a wide dimming range over an output voltage range of 2.5V to 13V. Unique PWM circuitry allows a dimming range of 250:1, avoiding the color shift normally associated with LED current dimming.

With its wide input range of 4V to 36V, the LTM8040 regulates a broad array of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers, lead acid batteries and distributed power supplies.

The LTM8040 is packaged in a thermally enhanced, compact (15mm × 9mm × 4.32mm) molded Land Grid Array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8040 is Pb-free and RoHS compliant.

Applications

Automotive and Avionic Lighting
Architectural Detail Lighting
Display Backlighting
Constant Current Sources

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $8.77

Technical Documents 4

LTM8040: 36V, 1A μModule (Power Module) LED Driver and Current Source Data Sheet 08/06/2009

R598 Reliability Data 03/26/2018

DC1274A - Demo Manual 07/15/2011

Design Note 445: µModule LED Driver Integrates All Circuitry, Including the Inductor, in a Surface Mount Package 01/01/2008

Reference Materials 1

Simplify Power Designs with Micromodule Products 04/10/2018

Design Resources 2

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTM8040EV#PBF	66-Lead LGA (15mm x 9mm x 4.32mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTM8040IV#PBF	66-Lead LGA (15mm x 9mm x 4.32mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTM8040EV#PBF
Pin/Package Drawing
66-Lead LGA (15mm x 9mm x 4.32mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTM8040IV#PBF
Pin/Package Drawing
66-Lead LGA (15mm x 9mm x 4.32mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Jul 21, 2021

- 21_0159

Ink Mark to Laser Mark Conversion for µModule

LTM8040EV#PBF

PRODUCTION

LTM8040IV#PBF

PRODUCTION

pdf

PCN21_0159_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Feb 28, 2020

- 20_0123

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

LTM8040EV#PBF

PRODUCTION

LTM8040IV#PBF

PRODUCTION

pdf

PCN20_0123_Form

xls

Material_Report

Test Correlation Report

Other

pdf

Qualification Results Summary

Filter by Model

Part Models

Product Lifecycle

PCN

Jul 21, 2021

- 21_0159

Ink Mark to Laser Mark Conversion for µModule

LTM8040EV#PBF

PRODUCTION

LTM8040IV#PBF

PRODUCTION

pdf

PCN21_0159_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Feb 28, 2020

- 20_0123

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

LTM8040EV#PBF

PRODUCTION

LTM8040IV#PBF

PRODUCTION

pdf

PCN20_0123_Form

xls

Material_Report

Test Correlation Report

Other

pdf

Qualification Results Summary

Companion Parts 3

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LTM8026	RECOMMENDED FOR NEW DESIGNS	36V_IN, 5A CVCC Step-Down μModule (Power Module) Regulator
Analog Temperature Sensors1
LTC2995	PRODUCTION	Temperature Sensor and Dual Voltage Monitor with Alert Outputs
Multitopology LED Driver1
LTM8042 LTM8042-1		μModule (Power Module) Boost LED Driver and Current Source

DC1274A

LTM8040EV Demo Board | µModule Buck LED Driver, 4V ≤ VIN ≤ 36V, VLED up to 13V @ 1A

LTM8040EV Demo Board | µModule Buck LED Driver, 4V ≤ VIN ≤ 36V, VLED up to 13V @ 1A

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DC1274A

LTM8040EV Demo Board | µModule Buck LED Driver, 4V ≤ VIN ≤ 36V, VLED up to 13V @ 1A

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Product Detail

Demo circuit DC1274A features the LTM8040 36V, 1A step-down constant current μModule^® LED driver. The demonstration circuit is designed to drive a single LED or string of LEDs at up to 1A from a wide input voltage range of 4V to 36V. The maximum LED string voltage is 13V and the minimum voltage varies depending upon the BIAS pin supply arrangement.

Resources

PDF

DC1274A - Demo Manual

888.00K

ZIP

DC1274A - Design File

2.00M

PDF

DC1274A - Schematic

19.00K

DC1274A

LTM8040EV Demo Board | µModule Buck LED Driver, 4V ≤ VIN ≤ 36V, VLED up to 13V @ 1A

LTspice 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.