Features:

• Up to 96% Typical Efficiency
• 800 mA Typical Peak Input Current Limit:
  • IOUT > 100 mA @ 1.2V VIN, 3.3V VOUT
  • IOUT > 350 mA @ 2.4V VIN, 3.3V VOUT
  • IOUT > 350 mA @ 3.3V VIN, 5.0V VOUT
• Low Start-Up Voltage: 0.65V, typical 3.3V VOUT @ 1 mA
• Low Operating Input Voltage: 0.35V, typical 3.3VOUT @ 1 mA
• Adjustable Output Voltage Range: 2.0V to 5.5V
• Maximum Input Voltage  VOUT < 5.5V
• Automatic PFM/PWM Operation (MCP1640/C):
  • PFM Operation Disabled (MCP1640B/D)
  • PWM Operation: 500 kHz
• Low Device Quiescent Current: 19 µA, typical PFM Mode (not switching)
• Internal Synchronous Rectifier
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
• Selectable, Logic Controlled Shutdown States:
  • True Load Disconnect Option (MCP1640/B)
  • Input to Output Bypass Option (MCP1640C/D)
• Shutdown Current (All States): < 1 µA
• Low Noise, Anti-Ringing Control
• Overtemperature Protection
• Available Packages:
  • 6-Lead SOT-23
  • 8-Lead 2 x 3 mm DFN