MCP1643
Features
- 1.6A Typical Peak Input Current Limit
- Up to 550 m A LED Load Current
- Low Start-up Voltage: 0.65V (typical, 25 m A 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 m V
- Minimal Power Loss on Sense Resistor
- Pulse-Width Modulation Mode Operation (1 MHz)
- Internal Synchronous Rectifier
- Internal pensation
- Inrush Current Limiting
- Internal Soft-Start (240 µs typical)
- Shutdown (EN = GND):
- True Load Disconnect
- Dimming Control by Variable Duty Cycle
- Shutdown Current: 1.2 µA (typical)
- Overtemperature protection
- Packages:
- MSOP-8
- 2x3 DFN-8
Applications
- One and Two Cell Alkaline and Ni MH/Ni Cd Portable LED Lighting Products
- LED Flashlight and Head Lamps
- Rechargeable Flashlights
- Wall LED...
