MAX4378
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MAX4378

Single/Dual/Quad High-Side Current-Sense Amplifiers with Internal Gain

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Industry's-First SOT23 High-Side Current-Sense Amplifier with Buffered Output

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $1.73
Features
  • Low-Cost Single/Dual/Quad High-Side Current-Sense Amplifiers
  • ±0.5% Typical Full-Scale Accuracy
  • +3V to +28V Supply Operation
  • Adjustable Current-Sense Capability with External Sense Resistor
  • Buffered Output Voltage with 2mA Drive
  • 1mA (typ) Supply Current
  • 2.0MHz Bandwidth (Gain = +20V/V)
  • Automotive Temperature Range (-40°C to +125°C)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
  • Three Gain Versions Available
    • +20V/V (MAX437_T)
    • +50V/V (MAX437_F)
    • +100V/V (MAX437_H)
  • Available in Space-Saving 5-pin SOT23 (Single), 8-pin µMAX (Dual), and 14-pin TSSOP (Quad)
  • AEC-Q100 Qualified, Refer to Ordering Information for the List of /V Parts
Additional Details
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The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-sense amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. These precision devices are offered in three fixed-gain versions of 20, 50, and 100:

GAIN SUFFIX
20 T
50 F
100 H

For example, MAX4376TAUK is a single high-side amplifier with a gain of 20.

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 battery pack in deep discharge.

The full-scale current reading can be set by choosing the appropriate voltage gain and external-sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution.

The MAX4376/MAX4377/MAX4378 operate over a supply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automotive temperature range of -40°C to +125°C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load.

The MAX4376 is available in a tiny 5-pin SOT23 package. The MAX4377/MAX4378 are available in space-saving 8-pin µMAX® and 14-pin TSSOP packages, respectively.

Applications

  • Automotive
  • Automotive Current Detect
  • Battery Chargers
  • Cell Phones
  • Current-Limited Power Supplies
  • Fuel Gauges in PC
  • General-System/Board-Level Current Monitoring
  • Notebook Computers
  • PA Bias Control
  • Portable/Battery-Powered Systems
  • Power-Management Systems
  • Smart Battery Packages
Part Models 12
1ku List Price Starting From $1.73

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Documentation

Documentation

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MAX4378TASD+
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Jul 3, 2023

- 2361NA

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Aug 18, 2021

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Aug 18, 2021

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Dec 11, 2018

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Apr 27, 2023

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May 22, 2018

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Jul 3, 2023

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Aug 18, 2021

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Aug 18, 2021

- 1702RA

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MAX4378FASD+T

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MAX4378HASD+T

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Dec 11, 2018

- 1754N

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MAX4378HAUD+

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MAX4378TAUD+

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MAX4378TAUD+T

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Apr 27, 2023

- 2361N1

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WAFER FAB

MAX4378TASD+

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May 22, 2018

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