LTC3454
Description
The LTC®3454 is a synchronous buck-boost DC/DC converter optimized for driving a single high power LED at currents up to 1A from a single cell Li-Ion battery input.
Key Features
- n 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 n 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)
Applications
- Cell Phone Torch Lighting
