Datasheet

MCP1640 SINGLE QUADRUPLE-A
BATTERY BOOST CONVERTER
REFERENCE DESIGN
 2010-2011 Microchip Technology Inc. DS51922B-page 11
Chapter 2. Installation and Operation
2.1 INTRODUCTION
2.1.1 MCP1640 Features
The MCP1640 device has been developed to increase battery life. The MCP1640 is
capable of regulating the output voltage over a wide range (2.0V to 5.5V), and typically
delivers over 100 mA load current at 3.3V output, when supplied from a single 1.5V
cell.
The key features of the MCP1640 that help optimize the battery life include:
• Up to 96% efficiency
• PFM switching mode for light loads
• Low input start-up voltage, typically 0.65V at 1 mA load current
• Low shutdown voltage (continuously operating down to 0.35V input under light
load condition)
• True Output Disconnect Shutdown option, preventing leakage current from input
to output (less than 1 µA is consumed from the battery in this mode)
• 19 µA typically quiescent current
For applications powered by alkaline cells that consume few milliamperes, the
MCP1640 device can operate to the minimum input voltage necessary to completely
drain the battery.