MAX4373
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MAX4373

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs

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Simplify Current Monitoring/Protection with One Tiny 10-Pin Package

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $1.75
Features
  • Integrated Current-Sensing Solution Simplifies High-Side Current Monitoring
    • Current-Sense Amplifier plus Internal Comparator and Bandgap Reference with Improved Accuracy
      • 1mV (max) Input Offset Voltage
      • 2% (max) Full-Scale Accuracy
      • Internal Bandgap Reference (±1.6% Accuracy)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage Ensures Current Monitoring Even In Deep Discharge of Battery Pack
  • Low Power Consumption Extends Battery Life
    • 50µA Supply Current
    • Single +2.7V to +28V Operating Supply
  • Latching Comparator Output Eliminates Oscillation
  • Three Gain Versions (+20V/V, +50V/V, +100V/V) Support Different Size Battery Packs
Additional Details
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The MAX4373/MAX4374/MAX4375 low-cost, micropower, high-side current-sense supervisors contain a high-side current-sense amplifier, bandgap reference, and comparator with latching output. They feature a voltage output that eliminates the need for gain-setting resistors, making them ideal for today's notebook computers, cell phones, and other systems where battery/DC current monitoring is critical. 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 0 to +28V input common-mode range is independent of the supply voltage, which ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge.

The comparator output of the MAX4373/MAX4374/ MAX4375 is latched to provide a turn-off flag that doesn't oscillate. In addition, the MAX4374/MAX4375 contain a second comparator for use in window-detection functions. The MAX4373/MAX4374/MAX4375 are available in three different gain versions (T = +20V/V, F = +50V/V, H = +100V/V) and use an external sense resistor to set the sensitivity of the input voltage to the load current. These features offer a high level of integration, resulting in a simple and compact current-sense solution.

The MAX4373/MAX4374/MAX4375 operate from a single +2.7V to +28V supply and consume 50µA. They are specified for the extended operating temperature range (-40°C to +85°C) and are available in 8-pin and 10-pin µMAX® packages.

Applications

  • Cell Phones
  • General-System/Board-Level Current Monitoring
  • Notebook Computers
  • Portable Battery-Powered Systems
  • Power-Management Systems
  • Precision Current Sources
  • Smart Battery Packs/Chargers
Part Models 12
1ku List Price Starting From $1.75

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX4373FESA+
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MAX4373FEUA+
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MAX4373HESA+
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MAX4373HESA+T
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MAX4373HEUA+
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MAX4373HEUA+T
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MAX4373TESA+
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Product Lifecycle

PCN

May 22, 2018

- 1702N

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MAX4373FESA+

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MAX4373FESA+T

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Sep 19, 2018

- 1753N

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MAX4373FEUA+

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MAX4373FEUA+T

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Jan 28, 2019

- 1753B

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MAX4373TEUA+

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Part Models

Product Lifecycle

PCN

May 22, 2018

- 1702N

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ASSEMBLY

MAX4373FESA+

PRODUCTION

MAX4373FESA+T

PRODUCTION

MAX4373HESA+

PRODUCTION

MAX4373HESA+T

PRODUCTION

MAX4373TESA+

PRODUCTION

MAX4373TESA+T

PRODUCTION

Sep 19, 2018

- 1753N

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ASSEMBLY

MAX4373FEUA+

PRODUCTION

MAX4373FEUA+T

PRODUCTION

MAX4373TEUA+

PRODUCTION

MAX4373TEUA+T

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Jan 28, 2019

- 1753B

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ASSEMBLY

MAX4373TEUA+

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX4374EVKIT

Evaluation Kit for the MAX4374

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MAX4374EVKIT

Evaluation Kit for the MAX4374

Evaluation Kit for the MAX4374

Features and Benefits

  • Precision Real-Time Current Monitoring
  • Overcurrent Protection and Reset Circuits
  • Overvoltage Indicator Circuit
  • 0 to 28V Input Common-Mode Range
  • 50µA Supply Current
  • 1mV (max) Input Offset Voltage
  • 2% (max) Full-Scale Accuracy
  • Lead(Pb)-Free and RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX4374 evaluation kit (EV kit) provides a proven design to evaluate the MAX4374 low-cost, micropower, high-side current-sense supervisor that contains a high-side current-sense amplifier, bandgap reference, and comparator with latching output. This EV kit demonstrates the MAX4374 in a 10-pin µMAX® package. The MAX4374 is also available in 14-pin SO, but that package is not compatible with this EV kit.

The MAX4374 EV kit PCB comes with a MAX4374FEUB+ installed, which is the 50V/V gain version. The MAX4374 EV kit can also be used to evaluate the MAX4374T (20V/V gain version), MAX4374H (100V/V gain version), MAX4375T (20V/V gain version), MAX4375F (50V/V gain version), and MAX4375H (100V/V gain version). Contact the factory for free samples of the pin-compatible MAX4374TEUB+, MAX4374HEUB+, MAX4375TEUB+, MAX4375FEUB+, or MAX4375HEUB+ devices.

Applications

  • Cell Phones
  • General-System/Board-Level Current Monitoring
  • Notebook Computers
  • Portable Battery-Powered Systems
  • Power-Management Systems
  • Precision Current Sources
  • Smart Battery Packs/Chargers

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