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  5. MAX4172


Overview

Features and Benefits

  • 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 Details

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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

SPICE Models

Product Recommendations

MAX4172 Companion Parts

Recommended Related Parts

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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX4172ESA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX4172ESA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX4172EUA+ Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
MAX4172EUA+T Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
MAX4172GUA+ Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
MAX4172GUA+T Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
Wafer Fabrication Data MAX4172 Reliability Data

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Sample & Buy


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Buy Now Pricing


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List Pricing


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