MAX4172
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MAX4172

Low-Cost, Precision, High-Side Current-Sense Amplifier

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Low-cost, Precision Current Monitoring For Portable Battery-Powered Applications

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Part Details
Part Models 6
1ku List Price Starting From $3.02
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
Additional Details
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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 MAX4172 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 (active-low 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.

Applications

  • Battery-Powered Applications
  • Closed-Loop Battery Chargers/Current Sources
  • Energy Management
  • Portable PCs: Notebooks, Subnotebooks, Palmtops
  • Portable Test/Measurement Systems
  • Portable/Cellular Phones
  • Smart Battery Packs/Chargers
Part Models 6
1ku List Price Starting From $3.02

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Product Lifecycle

PCN

Jan 14, 2019

- 1702D

ASSEMBLY

MAX4172ESA+

PRODUCTION

MAX4172ESA+T

PRODUCTION

Nov 26, 2018

- 1753A

ASSEMBLY

MAX4172EUA+

PRODUCTION

MAX4172EUA+T

PRODUCTION

MAX4172GUA+

PRODUCTION

MAX4172GUA+T

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Filter by Model

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Part Models

Product Lifecycle

PCN

Jan 14, 2019

- 1702D

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ASSEMBLY

MAX4172ESA+

PRODUCTION

MAX4172ESA+T

PRODUCTION

Nov 26, 2018

- 1753A

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ASSEMBLY

MAX4172EUA+

PRODUCTION

MAX4172EUA+T

PRODUCTION

MAX4172GUA+

PRODUCTION

MAX4172GUA+T

PRODUCTION

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