LT3591
LT3591
PRODUCTIONWhite LED Driver with Integrated Schottky in 3mm x 2mm DFN
- Part Models
- 2
- 1ku List Price
- Starting From $2.17
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Overview
- Drives Up to Ten White LEDs from a 3V Supply
- High Side Sense Allows “One Wire Current Source”
- Internal Schottky Diode
- One Pin Dimming and Shutdown
- 80:1 True Color PWM™ Dimming Range
- 42V Open LED Protection
- 1MHz Switching Frequency
- ±5% Reference Accuracy
- VIN Range: 2.5V to 12V
- Requires Only 2.2µF Output Capacitor
- Low Profile 8-Lead DFN Package
- (3mm × 2mm × 0.75mm)
The LT3591 is a fixed frequency step-up DC/DC converter specifically designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler one wire LED connection. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.
The high switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. Few external components are needed: open-LED protection and the Schottky diode are all contained inside a low profile 3mm × 2mm DFN package.
Applications
- Cellular Phones
- PDAs, Handheld Computers
- Digital Cameras
- MP3 Players
- GPS Receivers
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LT3591EDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LT3591EDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LT3591EDDB#TRMPBF | PRODUCTION | |
| LT3591EDDB#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3591
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
LT3591EDDB Demo Board | Boost LED Driver, 3V ≤ VIN ≤ 9V, VOUT = 40V @ 20mA