The MCP1642B-33I/MC is a highly efficient, compact, synchronous step-up DC-DC converter from Microchip Technology, designed to provide a fixed voltage output of 3.3V from input voltages as low as 0.35V. This makes it an ideal power solution for products powered by one-cell primary batteries (such as alkaline, NiCd, NiMH) or one-cell Li-Ion/Li-Polymer batteries.

Key Features

• Output Voltage: Fixed 3.3V output to power various electronic components.
• Input Voltage Range: 0.35V minimum start-up voltage, suitable for low voltage sources.
• High Efficiency: Up to 96% efficiency, reducing power loss and improving battery life.
• Adjustable Output: Output voltage can be adjusted from 2V to 5.5V with external feedback resistors.
• Low Quiescent Current: Ideal for battery-powered applications due to its low consumption.
• Shutdown Mode: Features a shutdown mode that reduces the quiescent current to 0.1µA (typical), further preserving battery life.
• PWM Operation: Fixed frequency PWM operation with a typical frequency of 500 kHz.
• Packaging: Available in a compact 8-pin MSOP package.
• Protection Features: Includes under-voltage lockout (UVLO), over-temperature protection, and over-current protection to ensure device and circuit safety.

Applications

The MCP1642B-33I/MC is versatile and can be used in a variety of applications, including but not limited to:

• Wireless sensors and networking
• Energy harvesting
• Portable electronics
• Medical devices
• Smart meters

Conclusion

With its ability to operate from extremely low input voltages and provide a stable output, along with its high efficiency and low quiescent current, the MCP1642B-33I/MC from Microchip Technology is an excellent choice for designers looking to extend battery life and reduce power consumption in their portable and battery-powered applications.