Features and Benefits

  • 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

Product Details

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.


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

Product Lifecycle icon-recommended 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)

Tools & Simulations


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.

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Step 2: Click on the link in the section below to download a demonstration circuit.

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Models for the following parts are available in LTspice:


Design Resources

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PCN-PDN Information

Sample & Buy

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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.