Overview
Features and Benefits
- 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
Product Details
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.
Applications
- Cell Phones
- General-System/Board-Level Current Monitoring
- Notebook Computers
- Portable Battery-Powered Systems
- Power-Management Systems
- Precision-Current Sources
- Smart-Battery Packs/Chargers
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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MAX4372 Reliability Data1/12/2023PDF156K
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DC Error Budget Calculator Simplifies Selection of Optimal Current-Sense Amplifiers4/9/2013
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Protect Current-Sense Amplifiers Against Overvoltage Transients4/8/2009
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Performance of Current-Sense Amplifiers with Input Series Resistors1/3/2007
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High-Side Current-Sense Measurement: Circuits and Principles11/19/2001
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.