General Description

The MAX4073 low-cost, high-side current-sense amplifier features a voltage output that eliminates the need for gain-setting resistors making it ideal for cell phones, notebook computers, PDAs, and other systems where current monitoring is crucial. High-side current monitoring does not interfere with the ground path of the battery charger making the MAX4073 particularly useful in battery-powered systems. The input common-mode range of +2V to +28V is independent of the supply voltage. The MAX4073’s wide 1.8MHz bandwidth makes it suitable for use inside battery-charger control loops.

Features

♦ Low-Cost, Compact, Current-Sense Solution

♦ Three Gain Versions Available +20V/V (MAX4073T) +50V/V (MAX4073F) +100V/V (MAX4073H)

♦ ±1.0 Full-Scale Accuracy

♦ 500µA Supply Current

♦ Wide 1.8MHz Bandwidth

♦ +3V to +28V Operating Supply

♦ Wide +2V to +28V Common-Mode Range Independent of Supply Voltage

♦ Automotive Temperature Range (-40°C to +125°C)

♦ Available in Space-Saving 5-Pin SC70 Package

Applications

Cell Phones

Notebook Computers

Portable/Battery-Powered Systems

Smart Battery Packs/Chargers

PDAs

Power Management Systems

PA Bias Control

General System/Board-Level Current Monitoring

Precision Current Sources