LT3518
LT3518
PRODUCTIONFull-Featured LED Driver with 2.3A Switch Current
- Part Models
- 12
- 1ku List Price
- Starting From $4.48
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Overview
- 3000:1 True Color PWM™ Dimming Ratio
- 2.3A, 45V Internal Switch
- 100mV High Side Current Sense
- Open LED Protection
- Adjustable Frequency: 250kHz to 2.5MHz
- Wide Input Voltage Range:
- Operation from 3V to 30V
- Transient Protection to 40V
- Operates in Boost, Buck Mode and Buck-Boost Mode
- Gate Driver for PMOS LED Disconnect
- Constant-Current and Constant-Voltage Regulation
- CTRL Pin Provides 10:1 Analog Dimming
- Low Shutdown Current: <1μA
- Available in (4mm × 4mm) 16-Lead QFN and 16-Pin TSSOP Packages
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. Programmable switching frequency allows optimization of the external components for efficiency or component size. The switching frequency of the LT3518 can be synchronized to an external clock signal. The LED current is externally programmable with a 100mV sense resistor. The external PWM input provides 3000:1 LED dimming. The CTRL pin provides further 10:1 dimming ratio.
The LT3518 is available in the tiny footprint 16-lead QFN (4mm × 4mm) and the 16-pin TSSOP package. The LT3518 provides a complete solution for both constant-voltage and constant-current applications.
Applications
- Display Backlighting
- Automotive and Avionic Lighting
- Illumination
- Scanners
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Video 1
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 |
|---|---|---|---|
| LT3518EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3518EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3518EUF#PBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3518EUF#TRPBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3518HFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3518HFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3518HUF#PBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3518HUF#TRPBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3518IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3518IFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3518IUF#PBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3518IUF#TRPBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3518EFE#PBF | PRODUCTION | |
| LT3518EFE#TRPBF | PRODUCTION | |
| LT3518HFE#PBF | PRODUCTION | |
| LT3518HFE#TRPBF | PRODUCTION | |
| LT3518IFE#PBF | PRODUCTION | |
| LT3518IFE#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/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 3
- LT3518 Demo Circuit - 45V, 2.3A Full-Featured Buck-Boost LED Driver (12V to 4x 3.4V LEDs @ 330mA)
- LT3518 Demo Circuit - 45V, 2.3A Full-Featured Buck LED Driver (24V to 3x 3.4V LEDs @ 1.5A)
- LT3518 Demo Circuit - 45V, 2.3A Full-Featured Boost LED Driver (12V to 10x 3.4V LEDs @ 330mA)
Models for the following parts are available in LTspice:
- LT3518
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.
