LT3756
LT3756-1
LT3756-2

PRODUCTION

100V_IN, 100V_OUT LED Controller

Data Sheet (Rev. C) Product Selection Table

Part Models: 44
1ku List Price: Starting From $3.84

Viewing:

Overview

3000:1 True Color PWM^™ Dimming
Wide Input Voltage Range: 6V to 100V
Output Voltage Up to 100V
Constant-Current and Constant-Voltage Regulation
100mV High Side Current Sense
Drives LEDs in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology
Adjustable Frequency: 100kHz to 1MHz
Open LED Protection
Programmable Undervoltage Lockout with Hysteresis

Improved Open LED Status Pin (LT3756-2)
Frequency Synchronization (LT3756-1)
PWM Disconnect Switch Driver
CTRL Pin Provides Analog Dimming
Low Shutdown Current: <1µA
Programmable Soft-Start
Thermally Enhanced 16-Lead QFN (3mm × 3mm) and MSOP Packages
AEC-Q100 Qualified for Automotive Applications

The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.

The LT3756/LT3756-1/LT3756-2 sense output current at the high side of the LED string. High side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. The PWM input provides LED dimming ratios of up to 3000:1, and the CTRL input provides additional analog dimming capability.

Applications

High Power LED Applications
Current Limited Constant Voltage Applications
Battery Charging

Part Models: 44
1ku List Price: Starting From $3.84

Documentation

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
LT3756EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-1#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-1#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-1#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-1#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-2#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-2#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-2#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EMSE-2#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD-2#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756EUD-2#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756HMSE-2#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756HMSE-2#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756HMSE-2#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756HMSE-2#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-1#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-1#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-1#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-1#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-2#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-2#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-2#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IMSE-2#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD-2#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756IUD-2#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756JMSE-2#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756JMSE-2#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756JMSE-2#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3756JMSE-2#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 17, 2025 - 25_0119 Bond Wire Change from Gold to Copper (Automotive)
		PCN25_0119_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT3756EMSE#PBF	PRODUCTION
LT3756EMSE#TRPBF	PRODUCTION
LT3756EMSE#WPBF	PRODUCTION
LT3756EMSE#WTRPBF	PRODUCTION
LT3756EMSE-1#PBF	PRODUCTION
LT3756EMSE-1#TRPBF	PRODUCTION
LT3756EMSE-1#WPBF	PRODUCTION
LT3756EMSE-1#WTRPBF	PRODUCTION
LT3756EMSE-2#PBF	PRODUCTION
LT3756EMSE-2#TRPBF	PRODUCTION
LT3756EMSE-2#WPBF	PRODUCTION
LT3756EMSE-2#WTRPBF	PRODUCTION
LT3756HMSE-2#PBF	PRODUCTION
LT3756HMSE-2#TRPBF	PRODUCTION
LT3756HMSE-2#WPBF	PRODUCTION
LT3756HMSE-2#WTRPBF	PRODUCTION
LT3756IMSE#PBF	PRODUCTION
LT3756IMSE#TRPBF	PRODUCTION
LT3756IMSE#WPBF	PRODUCTION
LT3756IMSE#WTRPBF	PRODUCTION
LT3756IMSE-1#PBF	PRODUCTION
LT3756IMSE-1#TRPBF	PRODUCTION
LT3756IMSE-1#WPBF	PRODUCTION
LT3756IMSE-1#WTRPBF	PRODUCTION
LT3756IMSE-2#WPBF	PRODUCTION
LT3756IMSE-2#WTRPBF	PRODUCTION
LT3756JMSE-2#PBF	PRODUCTION
LT3756JMSE-2#TRPBF	PRODUCTION
LT3756JMSE-2#WPBF	PRODUCTION
LT3756JMSE-2#WTRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3756EMSE#PBF	PRODUCTION
LT3756EMSE#TRPBF	PRODUCTION
LT3756EMSE-1#PBF	PRODUCTION
LT3756EMSE-1#TRPBF	PRODUCTION
LT3756EMSE-2#PBF	PRODUCTION
LT3756EMSE-2#TRPBF	PRODUCTION
LT3756HMSE-2#PBF	PRODUCTION
LT3756HMSE-2#TRPBF	PRODUCTION
LT3756IMSE#PBF	PRODUCTION
LT3756IMSE#TRPBF	PRODUCTION
LT3756IMSE-1#PBF	PRODUCTION
LT3756IMSE-1#TRPBF	PRODUCTION
LT3756IMSE-2#PBF	PRODUCTION
LT3756IMSE-2#TRPBF	PRODUCTION
LT3756JMSE-2#PBF	PRODUCTION
LT3756JMSE-2#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT3756EMSE#PBF	PRODUCTION
LT3756EMSE#TRPBF	PRODUCTION
LT3756EMSE#WPBF	PRODUCTION
LT3756EMSE#WTRPBF	PRODUCTION
LT3756EMSE-1#PBF	PRODUCTION
LT3756EMSE-1#TRPBF	PRODUCTION
LT3756EMSE-1#WPBF	PRODUCTION
LT3756EMSE-1#WTRPBF	PRODUCTION
LT3756EMSE-2#PBF	PRODUCTION
LT3756EMSE-2#TRPBF	PRODUCTION
LT3756EMSE-2#WPBF	PRODUCTION
LT3756EMSE-2#WTRPBF	PRODUCTION
LT3756HMSE-2#PBF	PRODUCTION
LT3756HMSE-2#TRPBF	PRODUCTION
LT3756HMSE-2#WPBF	PRODUCTION
LT3756HMSE-2#WTRPBF	PRODUCTION
LT3756IMSE#PBF	PRODUCTION
LT3756IMSE#TRPBF	PRODUCTION
LT3756IMSE#WPBF	PRODUCTION
LT3756IMSE#WTRPBF	PRODUCTION
LT3756IMSE-1#PBF	PRODUCTION
LT3756IMSE-1#TRPBF	PRODUCTION
LT3756IMSE-1#WPBF	PRODUCTION
LT3756IMSE-1#WTRPBF	PRODUCTION
LT3756IMSE-2#PBF	PRODUCTION
LT3756IMSE-2#TRPBF	PRODUCTION
LT3756IMSE-2#WPBF	PRODUCTION
LT3756IMSE-2#WTRPBF	PRODUCTION
LT3756JMSE-2#PBF	PRODUCTION
LT3756JMSE-2#TRPBF	PRODUCTION
LT3756JMSE-2#WPBF	PRODUCTION
LT3756JMSE-2#WTRPBF	PRODUCTION
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT3756EUD#PBF	PRODUCTION
LT3756EUD#TRPBF	PRODUCTION
LT3756EUD-1#PBF	PRODUCTION
LT3756EUD-1#TRPBF	PRODUCTION
LT3756EUD-2#PBF	PRODUCTION
LT3756EUD-2#TRPBF	PRODUCTION
LT3756IUD#PBF	PRODUCTION
LT3756IUD#TRPBF	PRODUCTION
LT3756IUD-1#PBF	PRODUCTION
LT3756IUD-1#TRPBF	PRODUCTION
LT3756IUD-2#PBF	PRODUCTION
LT3756IUD-2#TRPBF	PRODUCTION
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LT3756HMSE-2#PBF	PRODUCTION
LT3756HMSE-2#TRPBF	PRODUCTION
LT3756HMSE-2#WPBF	PRODUCTION
LT3756HMSE-2#WTRPBF	PRODUCTION
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3756HMSE-2#PBF	PRODUCTION
LT3756HMSE-2#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Digital to Analog Converters (DACs) 1
LTC2627	PRODUCTION	12-Bit Dual Rail-to-Rail with I²C Interface
Protection Switches & Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode
Pulse-Width Modulation (PWM) & Pulse Generators 1
LTC6992		TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)

Tools & Simulations

LTspice 4

Models for the following parts are available in LTspice:

LT3756
LT3756-1
LT3756-2

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.

Evaluation Kits

LT3756EMSE-2 Demo Board | Boost LED Driver Controller, 8V ≤ VIN ≤ 80V, VLED = 80V @ 0.5A

Buy Now View Details

Product Details

Demonstration circuit 1319B-A/1319B-B is a high voltage and high current LED driver controller. The V_IN pin input voltage is as high as 100V, and the LED output voltage is also as high as 100V. The demonstration circuit is assembled as a boost topology from 8V to 80V input and up to 80V LED output at 0.5A with an open-LED status pin (DC1319B-A) or a sync input pin (DC1319B-B). DC1319B features PWM dimming, analog dimming, shutdown, and open-LED overvoltage protection.

Resources

DC1319B - Demo Manual
11/13/2009

DC1319B - Schematic
11/13/2009

DC1319B - Design Files
11/13/2009

LT3756EMSE-1 Demo Board | Boost LED Driver Controller, 8V ≤ VIN ≤ 80V, VLED up to 80V @ 0.5A

Buy Now View Details

Product Details

Demonstration circuit 1319B is a high voltage and high current LED driver controller feature the LT3756-1 (DC1319B-B) or the LT3756-2 (DC1319B-A). The device's V_IN pin input voltage and LED output voltage can be as high as 100V; however, the demo board's open-LED overvoltage protection limits the input voltage to 80V and limits the output to approximately 92V if the LED string is opened.The demonstration circuit is assembled as a boost topology from 8V to 80V input and up to 80V LED output at 0.5A and features an open-LED status pin (DC1319B-A) or a sync input pin (DC1319B-B). DC1319B also features PWM dimming, analog dimming, shutdown, and open-LED overvoltage protection.