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MAX4172ESA+/MAX4172EUA+/MAX4172GUA+, Analog Devices / Maxim Integrated

MAX4172ESA+/MAX4172EUA+/MAX4172GUA+, Analog Devices / Maxim Integrated


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Ordering Information

MAX4172ESA+ -40°C to +85°C 8 SO
MAX4172EUA+ -40°C to +85°C 8 μMAX
MAX4172GUA+ -40°C to +105°C 8 µMAX

+Denotes a lead(Pb)-free/RoHS-compliant package.


The MAX4172 is a low-cost, precision, high-side current sense 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 current source 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.


  • 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

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