MCP1640 Single Quad-A Battery Boost Converter Reference Design
The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design (MCP1640RD-4ABC) demonstrates how the MCP1640 device, with the True Output Disconnect Shutdown option, works attached to a microcontroller application.
This board demonstrates how to optimize battery life using the MCP1640, and an 8-bit low cost PIC microcontroller, to reduce the No Load Input Current for applications that operate in Standby mode for a long period of time. During Standby, the enable signal for the MCP1640 has a low frequency, with less than 1% positive duty cycle. This maintains the output of the MCP1640 device up to 2.3V, which is sufficient to keep the PIC microcontroller live. This solution reduces up to 80% of the No Load Input Current the MCP1640 consumes in PFM Mode.
The MCP1640 device is a compact, high-efficiency, fixed frequency, step-up DC-DC converter. It provides an easy-to-use power supply solution, with a minimum number of external components.
Key Applications: One, Two and Three Cell Alkaline and NiMH/NiCd Portable Products, Single Cell Li-Ion to 5V Converters, Li Coin Cell Powered Devices, Personal Medical Products, Wireless Sensors, Handheld Instruments, GPS Receivers, Bluetooth Headsets, +3.3V to +5.0V Distributed Power Supply
Features
- Input voltage: one AAAA Alkaline battery
- Output voltage: 3.3V
- Output current: < 130 mA
- Up to 75% efficiency
- Standby battery current: 14.5 μA @ 1.5V input
- Start-up voltage: 0.65V at VIN = 1.2V, VOUT = 3.3V and IOUT = 1 mA, resistive load
- Automatic PFM/PWM operation
- PWM Switching Frequency = 500 kHz
- ON/OFF switch button, with 25 seconds ON
- LED status indication (Output ON and Low Battery)
- Energizer® Battery Holder with reverse battery protection
Ships With
- MCP1640 Single Quadruple-A Battery Boost Converter Reference Design Board
- Important Information Sheet