LT3519/LT3519-1/LT3519-2 - LED Driver with Integrated Schottky Diode

Features

  • Up to 3000:1 True Color PWM™ Dimming
  • Wide Input Voltage Range
    Operation from 3V to 30V
    Transient Protection to 40V
  • Rail-to-Rail LED Current Sense from 0V to 45V
  • 45V, 750mA Internal Switch
  • Internal Schottky Diode
  • Constant-Current and Constant-Voltage Regulation
  • Boost, SEPIC, Buck-Boost Mode or Buck Mode Topology
  • Open LED Protection and Open LED Status Pin
  • Programmable Undervoltage Lockout with Hysteresis
  • Fixed Frequency: 400kHz (LT3519), 1MHz (LT3519-1), 2.2MHz (LT3519-2)
  • Internal Compensation
  • CTRL Pin Provides Analog Dimming
  • Low Shutdown Current: <1μA
  • 16-Lead MSOP Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3519 Typical Application
LT3519 Typical Application

Description

The LT3519/LT3519-1/LT3519-2 are fixed frequency step-up DC/DC converters designed to drive LEDs. They feature an internal 45V, 750mA low side switch and Schottky diode. Combining a traditional voltage feedback and a unique rail-to-rail current sense feedback allows these converters to operate as a constant-voltage source or constant-current source. Internal compensation simplifies applications. These devices feature rail-to-rail LED current sense pins that provide the most flexibility in choosing a converter configuration to drive the LEDs. The LED current is externally programmable with a sense resistor. The external PWM provides up to 3000:1 PWM dimming and the CTRL input provides analog dimming.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LT3519EMS-1#PBF MS-16 MS E 05-08-1669 Yes
LT3519EMS-1#TRPBF MS-16 MS E 05-08-1669 Yes
LT3519EMS-2#PBF MS-16 MS E 05-08-1669 Yes
LT3519EMS-2#TRPBF MS-16 MS E 05-08-1669 Yes
LT3519EMS#PBF MS-16 MS E 05-08-1669 Yes
LT3519EMS#TRPBF MS-16 MS E 05-08-1669 Yes
LT3519IMS-1#PBF MS-16 MS I 05-08-1669 Yes
LT3519IMS-1#TRPBF MS-16 MS I 05-08-1669 Yes
LT3519IMS-2#PBF MS-16 MS I 05-08-1669 Yes
LT3519IMS-2#TRPBF MS-16 MS I 05-08-1669 Yes
LT3519IMS#PBF MS-16 MS I 05-08-1669 Yes
LT3519IMS#TRPBF MS-16 MS I 05-08-1669 Yes


LT3519 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3519EMS-1#PBF MS-16 E $3.57 $2.50 Yes
LT3519EMS-1#TRPBF MS-16 E $2.56 Yes
LT3519EMS-2#PBF MS-16 E $3.57 $2.50 Yes
LT3519EMS-2#TRPBF MS-16 E $2.56 Yes
LT3519EMS#PBF MS-16 E $3.57 $2.50 Yes
LT3519EMS#TRPBF MS-16 E $2.56 Yes
LT3519IMS-1#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS-1#TRPBF MS-16 I $3.00 Yes
LT3519IMS-2#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS-2#TRPBF MS-16 I $3.00 Yes
LT3519IMS#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS#TRPBF MS-16 I $3.00 Yes
Buy NowRequest Samples
* 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
DC1482A LT3519EMS Demo Board | Boost LED Driver with Integrated Schottky Diode, 6V ≤ VIN ≤ 30V, VLED = 38V @ 100mA $100.00
DC1612A-A LT3519EMS-1 Demo Board | SEPIC LED Driver, 1MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA $100.00
DC1612A-B LT3519EMS-2 Demo Board | SEPIC LED Driver, 2.2MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA $100.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3519IMS-1#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS-1#TRPBF MS-16 I $3.00 Yes
LT3519IMS-2#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS-2#TRPBF MS-16 I $3.00 Yes
LT3519IMS#PBF MS-16 I $4.20 $2.94 Yes
LT3519IMS#TRPBF MS-16 I $3.00 Yes
Buy NowRequest Samples
* 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.

Applications

  • Automotive
  • Industrial
  • Constant Current Source
  • Current Limited Constant Voltage Source

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT3519
LT3519-1
LT3519-2

Technical Support