One stop supply of electronic components MAX4172ESA+ Current Sense Amplifier 1 Circuit 8-SOIC

Product Descriptions

The MAX4172 is a low-cost, precision, high-side currentsense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the battery charger’s ground path. Wide bandwidth and ground-sensing capability make the device suitable for closed-loop battery-charger and general-purpose currentsource applications. The 0 to 32V input common-mode range is independent of the supply voltage, which ensures that current-sense feedback remains viable, even when connected to a battery in deep discharge.

To provide a high level of flexibility, the MAX4172 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents.

An open-collector power-good output (PG) indicates when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifier. The MAX4172 operates with a 3.0V to 32V supply voltage, and is available in a space-saving, 8-pin μMAX® or SO package.

Product Features

● Ideal for High-Side Monitoring

• 3V to 32V Supply Operation

• ±0.5% Typical Full-Scale Accuracy Over Temperature

• High Accuracy +2V to +32V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage

• 800kHz Bandwidth [VSENSE = 100mV (1C)]

• 200kHz Bandwidth [VSENSE = 6.25mV (C/16)]

● Minimizes Board Space Requirements

• μMAX and SO Packages

Product Applications

● Portable PCs: Notebooks/Subnotebooks/Palmtops

● Battery-Powered/Portable Equipment

● Closed-Loop Battery Chargers/Current Sources

● Smart-Battery Packs

● Portable/Cellular Phones

● Portable Test/Measurement Systems

● Energy Management Systems

Specifications

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