Product Description
The SmartOR CMPWR025 is a dual input power switch that selects between two different power inputs and delivers it to one output. The device integrates two very low impedance power switches and automatically implements an OR function that selects the higher of the two inputs. Hysteresis is built in (and is user selectable) to prevent switch chatter.

FEATUREs
• Implements Logical “Input VCC1 OR Input VCC2”
• Integrated Low Impedance Switches (0.2 Ω TYP)
• Operating Supply Range from 2.8 V to 5.5 V
• Provides Up to 600 mA Output Current
• Glitch−Free Output During Supply Switching Transitions
• Low Operating Supply Current of 20 μA (TYP)
• User−Selectable Hysteresis for Supply Selection
• 8−Pin MSOP Package
• These Devices are Pb−Free and are RoHS Compliant

APPLICATIONs
• PCI Cards for Wake−On−LAN/Wake−On−Ring
• Dual Power Systems
• Systems with Standby Capabilities
• Battery Backup Systems
• See also Application Note AP−211
• USB Enabled Mobile Electronics such as MP3 Players, PDAs, Digital Cameras and Wireless Handsets