MCP1640T-I/CHY

The MCP1640T-I/CHY is a 0.65V start-up synchronous Boost Regulator with true output disconnect or input/output bypass option. The MCP1640 is a compact high-efficiency fixed frequency synchronous step-up DC-DC converter provides an easy-to-use power supply solution for applications powered by either one-cell, two-cell or three-cell alkaline, NiCd, NiMH, one-cell Li-ion or Li-polymer batteries. It provides very high efficiency through integration of the low resistance N-channel boost switch and synchronous P-channel switch. Low-voltage technology allows the regulator to start-up without high inrush current or output voltage overshoot from a low 0.65V input. High efficiency is accomplished by integrating the low resistance N-channel boost switch and synchronous P-channel switch. All compensation and protection circuitry is integrated to minimize the number of external components.

• Up to 96% typical efficiency
• 800mA Typical peak input current limit
• 0.65V Low start-up voltage
• 0.35V Operating input voltage
• Automatic PFM/PWM operation
• PWM operation at 500kHz
• 19µA Typical PFM mode low device quiescent current
• <lt/>1µA Shutdown current (all states)
• Internal synchronous rectifier
• Internal compensation
• Inrush current limiting and internal soft-start
• True load disconnect shutdown
• Low noise, anti-ringing control
• Over-temperature protection