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LT3590: 48V Buck Mode LED Driver in SC70 and 2mm × 2mm DFN Data Sheet8/20/2007PDF231K
Overview
Features and Benefits
- 4.5V to 55V Input Voltage Range
- Up to 50mA LED Current
- 80mA, 55V Switch
- Internal Schottky Diode
- 15µA Supply Current in Shutdown
- 500µA Supply Current Operating, Not Switching
- Switching Frequency: 850kHz
- 200mV Feedback Voltage with ±5% Accuracy
- CTRL Input Performs Dimming and Shutdown
- 91% Efficiency (10 LEDs, 50mA)
- Requires Only 1µF Output Capacitor
- 8-Lead SC70 Package
- 6-Lead 2mm × 2mm DFN Package
Product Details
The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series from a 48V DC source. Series connection of the LEDs provides identical LED currents of up to 50mA, resulting in uniform brightness and eliminating the need for ballast resistors. A fixed frequency, current mode architecture results in stable operation over a wide range of input voltage and output voltage.
The high switching frequency of 850kHz permits the use of tiny, low profile inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. The power switch, Schottky diode and control circuitry are all contained inside a space saving SC70 package or 2mm × 2mm DFN package to allow a small converter footprint and lower parts cost.
Applications
- LED Fixed Signage
- Traffic Signs
- Neon Sign Replacement
Product Categories
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 (1)
Documentation & Resources
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R518 Reliability Data3/26/2018PDF34 K
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DC1166A - Demo Manual9/28/2016PDF430K
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Efficient 48V Buck Mode LED Driver Delivers 50mA1/1/2008 LT Journal
Tools & Simulations
LTspice
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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.

LTspice Simulations
Models for the following parts are available in LTspice:
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 |
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LT3590EDC#TRMPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
LT3590EDC#TRPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 2mm w/ EP) | |
LT3590ESC8#TRMPBF | Material Declaration | Reliability Data | 8-Lead SC70 | |
LT3590ESC8#TRPBF | Material Declaration | Reliability Data | 8-Lead SC70 | |
Wafer Fabrication Data | R518 Reliability Data |
Support & Discussions
LT3590 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
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
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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.