General Description
The MAX471/MAX472 are complete, bidirectional, high side current-sense amplifiers for portable PCs, tele
phones, and other systems where battery/DC power-line monitoring is critical. High-side power-line  monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in “smart” batteries.

FEATUREs
♦Complete High-Side Current Sensing
♦Precision Internal Sense Resistor (MAX471)
♦2% Accuracy Over Temperature
♦Monitors Both Charge and Discharge
♦3A Sense Capability with Internal Sense Resistor (MAX471)
♦Higher Current-Sense Capability with External Sense Resistor (MAX472)
♦100µA Max Supply Current
♦18µA Max Shutdown Mode
♦3V to 36V Supply Operation
♦8-Pin DIP/SO Packages

APPLICATIONs
Portable PCs: Notebooks/Subnotebooks/Palmtops
Smart Battery Packs
Cellular Phones
Portable Phones
Portable Test/Measurement Systems
Battery-Operated Systems
Energy Management Systems