DESCRIPTION
The LT®3592 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.

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

APPLICATIONS
■ Automotive Signal Lighting
■ Industrial Lighting
■ Constant-Current, Constant Voltage Supplies