1A Synchronous Buck-Boost High Current LED Driver Features: High Efficiency: >90% Typical in Torch Mode, >80% in Flash Mode Wide VIN Range: 2.7V to 5.5V Up to 1A Continuous Output Current 3.5% LED Current Programming Accuracy Internal Soft-Start Open/Shorted LED Protection Constant Frequency 1MHz Operation Zero Shutdown Current Overtemperature Protection Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN Package