LT3592 - 500mA Wide Input Voltage Range Step-Down LED Driver with 10:1 Dimming

Features

  • Wide Input Voltage Range Operation from 3.6V to 36V
  • Resistor Adjustable 400kHz–2.2MHz Switching Frequency
  • Shorted and Open LED Protected
  • Internal Switch Current Sense Resistor
  • External Resistor Programs LED Current, Pin Selects 10:1 Ratio
  • 50mA/500mA LED Current Settings
  • Catch Diode Current Sense to Prevent Runaway at High VIN
  • Small Thermally Enhanced 10-Lead DFN (2mm × 3mm) and MSOP-10 Packages
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3592 Typical Application
LT3592 Typical Application

Description

The LT3592 is a fixed frequency step-down DC/DC converter designed to operate as a constant-current source. An external sense resistor monitors the output current allowing accurate current regulation, ideal for driving high current LEDs. The output current can be dimmed by a factor of 10 using an external signal for nighttime brake lights.

The high switching frequency offers several advantages by permitting the use of a small inductor and small ceramic capacitors. Small components combined with the LT3592’s 10-pin DFN leadless surface mount package save space and cost versus alternative solutions. The constant switching frequency combined with low-impedance ceramic capacitors result in low, predictable output ripple.

A wide input voltage range of 3.6V to 36V makes the LT3592 useful in a variety of applications. Current mode PWM architecture provides fast transient response and cycle-by-cycle current limiting. Thermal shutdown provides additional protection.

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
LT3592EDDB#PBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3592EDDB#TRMPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3592EDDB#TRPBF 3x2 DFN-10 DDB E 05-08-1722 Yes
LT3592EMSE#PBF MS-10E MSE E 05-08-1664 Yes
LT3592EMSE#TRPBF MS-10E MSE E 05-08-1664 Yes
LT3592IDDB#PBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LT3592IDDB#TRMPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LT3592IDDB#TRPBF 3x2 DFN-10 DDB I 05-08-1722 Yes
LT3592IMSE#PBF MS-10E MSE I 05-08-1664 Yes
LT3592IMSE#TRPBF MS-10E MSE I 05-08-1664 Yes


LT3592 Package Drawing
LT3592 Package Drawing

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
LT3592EDDB#PBF 3x2 DFN-10 E $2.36 Yes
LT3592EDDB#TRMPBF 3x2 DFN-10 E $2.36 $1.70 Yes
LT3592EDDB#TRPBF 3x2 DFN-10 E $2.36 $1.65 Yes
LT3592EMSE#PBF MS-10E E $2.50 $1.75 Yes
LT3592EMSE#TRPBF MS-10E E $1.81 Yes
LT3592IDDB#PBF 3x2 DFN-10 I $2.71 Yes
LT3592IDDB#TRMPBF 3x2 DFN-10 I $2.71 $1.95 Yes
LT3592IDDB#TRPBF 3x2 DFN-10 I $2.71 $1.90 Yes
LT3592IMSE#PBF MS-10E I $2.87 $2.01 Yes
LT3592IMSE#TRPBF MS-10E I $2.07 Yes
Buy NowRequest Samples
* The USA 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 Linear Technology sales office or authorized distributor.

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
DC1205A LT3592EDDB Demoboard | 500mA Wide Input Voltage Range Step-Down LED Driver with 10:1 Dimming $75.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3592IMSE#PBF MS-10E I $2.87 $2.01 Yes
LT3592IMSE#TRPBF MS-10E I $2.07 Yes
Buy NowRequest Samples
* The USA 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 Linear Technology sales office or authorized distributor.

Applications

  • Automotive Signal Lighting
  • Industrial Lighting
  • Constant-Current, Constant Voltage Supplies

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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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LT3592

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