Datasheet Maxim MAX4173HESA+

LE AVAILAB MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
General Description The MAX4173 low-cost, precision, high-side currentsense amplifier is available in a tiny SOT23-6 package.
It features a voltage output that eliminates the need for
gain-setting resistors and it is ideal for today’s notebook
computers, cell phones, and other systems where current monitoring is critical. High-side current monitoring
is especially useful in battery-powered systems, since it
does not interfere with the ground path of the battery
charger. The input common-mode range of 0 to +28V is
independent of the supply voltage and ensures that the
current-sense feedback remains viable even when connected to a battery in deep discharge. The MAX4173’s
wide 1.7MHz bandwidth makes it suitable for use inside
battery charger control loops.
The combination of three gain versions and a userselectable external sense resistor sets the full-scale
current reading. This feature offers a high level of integration, resulting in a simple and compact currentsense solution.
The MAX4173 operates from a single +3V to +28V supply, typically draws only 420µA of supply current over
the extended operating temperature range (-40°C to
+85°C), and is offered in the space-saving SOT23
package. Features
o Low-Cost, Compact Current-Sense Solution
o High Accuracy +2V to +28V Common-Mode
Range, Functional Down to 0V, Independent of …