The MAX4372 low-cost, precision, high-side current-sense
amplifier is available in a tiny, space-saving
SOT23-5-pin package. Offered in three gain versions
(T = 20V/V, F = 50V/V, and H = 100V/V), this device
operates from a single 2.7V to 28V supply and consumes
only 30µA. It features a voltage output that eliminates
the need for gain-setting resistors and is ideal for
today's notebook computers, cell phones, and other
systems where battery/DC 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
2-cell battery pack in deep discharge.
The user can set the full-scale current reading by
choosing the device (T, F, or H) with the desired voltage
gain and selecting the appropriate external sense
resistor. This capability offers a high level of integration
and flexibility, resulting in a simple and compact current-sense solution. For higher bandwidth applications,
refer to the MAX4173T/F/H data sheet.
Key Features
Applications/Uses
Low-Cost, Compact Current-Sense Solution
30µA Supply Current
2.7V to 28V Operating Supply
0.18% Full-Scale Accuracy
0.3mV Input Offset Voltage
Low 1.5Ω Output Impedance
Three Gain Versions Available
20V/V (MAX4372T)
50V/V (MAX4372F)
100V/V (MAX4372H)
Wide 0 to 28V Common-Mode Range,
Independent of Supply Voltage
Available in a Space-Saving 5-Pin SOT23 Package
and 3 x 2 UCSP&8482; (1mm x 1.5mm) Package
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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