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