MAX4375

PRODUCTION

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

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

Data Sheet (Rev. 5) Product Selection Table
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Overview

  • 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

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
MAX4375
Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs
MAX4373, MAX4374, MAX4375: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Technical Articles 4

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Current Sense Amplifiers 5
MAX4071
PRODUCTION Bidirectional, High-Side, Current-Sense Amplifiers with Reference
MAX4070
PRODUCTION Bidirectional, High-Side, Current-Sense Amplifiers with Reference
MAX4173
PRODUCTION Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4172
PRODUCTION Low-Cost, Precision, High-Side Current-Sense Amplifier
MAX4372
RECOMMENDED FOR NEW DESIGNS Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output
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Tools & Simulations

SPICE Model 3

Evaluation Kits

MAX4374EVKIT

Evaluation Kit for the MAX4374

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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 Details

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
MAX4374EVKIT
Evaluation Kit for the MAX4374

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