The LM2757TMX from Texas Instruments is a high-performance, switch-mode charge pump designed to provide a constant current to high power LEDs.

• Applications: Flash and torch functionality in smartphones, PDAs, and other handheld devices, LCD backlighting in portable devices, automotive interior or exterior lighting, and industrial lighting.
• Supply Voltage: 2.7V to 5.5V.
• Current Accuracy: ±5%.
• Operation Frequency: Fixed 1MHz.
• Mode Switching: Adaptive 1x/1.5x/2x.
• Safety Features: Thermal shutdown, over-voltage protection, and short-circuit protection.
• Package: 12-bump micro SMD.