DESCRIPTION
DESCRIPTION The LT®3743 is a fixed frequency synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). LED dimming is achieved through analog dimming on the CTRL_L, CTRL_H and CTRL_T pins and with PWM dimming on the PWM and CTRL_SEL pins.

FEATURES
■ PWM Dimming Provides Up to 3000:1 Dimming Ratio
■ CTRL_SEL Dimming Provides Up to 3000:1 Dimming
   Ratio Between Any Current
■ Three-State Current Control for Color Mixing
■ ±6% Current Regulation Accuracy
■ 6V to 36V Input Voltage Range
■ Average Current Mode Control
■ 2μs Maximum Recovery Time Between Any Current
   Regulation State
■ <1μA Shutdown Current
■ Output Voltage Regulation and Open-LED Protection
■ Thermally Enhanced 4mm × 5mm QFN and
   28-Pin FE Package

APPLICATIONS
■ DLP Projectors
■ High Power Architectural Lighting
■ Laser Diodes