MCP1640RD-4ABC MCP1640 Single Quad-A Battery Boost Converter Reference Design

The MCP1640 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.

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

Documentation & Software

AppNotes	Last Updated	Size
AN1337 - Optimizing Battery Life in DC Boost Converters Using MCP1640	10/6/2010 9:04:30 AM	549KB
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design	9/14/2011 9:13:23 AM	498KB
MCP1640 Quad A Reference Design Gerbers	11/19/2010 10:57:59 AM	169KB
MCP1640 Quad A Reference Design Firmware	11/18/2010 7:43:28 AM	86KB