Microchip | MCP1640RD-4ABC

The MCP1640RD-4ABC Single Quadruple-A Battery Boost Converter Reference Design 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.

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

Kit Contains:

• One MCP1640 Single Quadruple-A Battery Boost Converter Evaluation Board