Overview
Features and Benefits
- 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
Product Details
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.
Applications
- Automotive
- Industrial
- Constant Current Source
- Current Limited Constant Voltage Source
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (3)
Documentation & Resources
-
R518 Reliability Data3/26/2018
-
DC1612A - Demo Manual3/12/2010
-
DC1482A - Demo Manual10/22/2009
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.
Models for the following parts are available in LTspice:
LT3519
LT3519-1
LT3519-2
Product Recommendations
LT3519 Companion Parts
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 |
|---|---|---|---|---|
| LT3519EMS#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519EMS#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519EMS-1#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519EMS-1#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519EMS-2#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519EMS-2#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS-1#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS-1#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS-2#PBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| LT3519IMS-2#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP | |
| Wafer Fabrication Data | R518 Reliability Data |
PCN-PDN Information
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Support & Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.