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500mA Wide Input Voltage Range Step-Down LED Driver with 10:1 Dimming
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LT3592
500mA Wide Input Voltage
Range Step-Down LED Driver
with 10:1 Dimming
DESCRIPTION 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 n 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.
The high switching frequency offers several advantages by …