MCP1643
Key Features
- 1.6A Typical Peak Input Current Limit
- Up to 550 mA LED Load Current
- Low Start-up Voltage: 0.65V (typical, 25 mA LED Current)
- Low Operating Input Voltage: down to 0.5V
- Maximum Input Voltage < VLED < 5.0V
- Maximum Output Voltage
- 5.0V - Overvoltage Protection
- Low Reference Voltage: - VFB = 120 mV - Minimal Power Loss on Sense Resistor
- Pulse-Width Modulation Mode Operation (1 MHz)
- Internal Synchronous Rectifier
Applications
- LED Flashlight and Head Lamps
