GENERAL DESCRIPTION
The IS31LT3354 is a continuous mode inductive step-down converter, designed for driving a single LED or multiple series connected LEDs efficiently from a voltage source higher than the required LED voltage. The device operates from an input supply between 6V and 40V and provides an externally adjustable output current of up to 2A or even higher, which is determined by the external MOSFET and inductor.

FEATURES
● Simple low parts count
● Wide input voltage range: 6V to 40V
● Output Current only limited by external
   component selection
● High efficiency (up to 98% )
● Typical 1200:1 dimming ratio
● Typical 3% output current accuracy
● Single pin on/off and brightness control using
   DC voltage or PWM
● Up to 1MHz switching frequency
● Inherent open-circuit LED protection
● Thermal shutdown protection circuitry

APPLICATIONS
● Low voltage halogen replacement LEDs
● Automotive lighting
● Low voltage industrial lighting
● LED back-up lighting
● Illuminated sign