LT3590 - 48V Buck Mode LED Driver in SC70 and 2mm x 2mm DFN
Features
- 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
Typical Application
Description
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 x 2mm DFN package to allow a small converter footprint and lower parts cost.
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 |
|---|---|---|---|---|---|
| LT3590EDC#PBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LT3590EDC#TRMPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LT3590EDC#TRPBF | 2x2 DFN-6 | DC6 | E | 05-08-1703 | Yes |
| LT3590ESC8#PBF | SC-70 | SC8 | E | 05-08-1639 | Yes |
| LT3590ESC8#TRMPBF | SC-70 | SC8 | E | 05-08-1639 | Yes |
| LT3590ESC8#TRPBF | SC-70 | SC8 | E | 05-08-1639 | Yes |
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 | |
|---|---|---|---|---|---|---|
| LT3590EDC#PBF | 2x2 DFN-6 | E | $2.00 | Yes | ||
| LT3590EDC#TRMPBF | 2x2 DFN-6 | E | $2.00 | $1.45 | Yes | |
| LT3590EDC#TRPBF | 2x2 DFN-6 | E | $2.00 | $1.40 | Yes | |
| LT3590ESC8#PBF | SC-70 | E | $2.00 | Yes | ||
| LT3590ESC8#TRMPBF | SC-70 | E | $2.00 | $1.45 | Yes | |
| LT3590ESC8#TRPBF | SC-70 | E | $2.00 | $1.40 | Yes | |
| Buy Now • Request Samples | ||||||
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 |
|---|---|---|---|
| DC1166A | LT3590EDC Demo Board | Buck Mode LED Driver, Tiny Package, 4.5V ≤ VIN ≤ 54V, VLED up to 40V @ 50mA | $75.00 | |
| Buy Now | |||
Applications
- LED Fixed Signage
- Traffic Signs
- Neon Sign Replacement
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
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Models for the following parts are available in LTspice:
LT3590
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
