描述 Description

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.

特性 Features

? 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)
? High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
? Available in a Space-Saving 5-Pin SOT23 Package and 3 x 2 UCSP? (1mm x 1.5mm) Package

應(yīng)用 Application

? 蜂窩電話
? 通用系統(tǒng)/板級(jí)電流監(jiān)視
? 筆記本電腦
? 便攜式電池供電系統(tǒng)
? 電源管理系統(tǒng)
? 精密電流源
? 智能電池組/充電器