High-Side Current-Sense Amplifier
AVAILABLE
MAX4173
Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
General Description
The MAX4173 l...
Description
AVAILABLE
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 hi...
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