MAX4373

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

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


Please check latest availability status for a specific part variant.

Description

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.
MAX4373, MAX4374, MAX4375: Typical Operating Circuit MAX4373, MAX4374, MAX4375: Typical Operating Circuit Enlarge+

Key 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

Applications/Uses

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

See parametric specs for Current Sense Amplifiers (52)


Part NumberOutput FormatCMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. SenseVSENSE_FS
(mV)
VOS @25°C
(µV)
GainGain Accuracy @25°C
(%)
BW
(kHz)
ComparatorsReferenceOper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.maxmax@ -3dBSee Notes
MAX4373 Voltage0282.72850No
100
150
1000
100 V/V
20 V/V
50 V/V
1.7
110
120
200
1Bandgap-40 to +85
SOIC (N)/8
UMAX/8
$1.55 @1k
MAX4374 2
SOIC (N)/14
UMAX/10
$1.19 @1k
MAX4375 2
SOIC (N)/14
UMAX/10
$1.19 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX4374EVKIT: Evaluation Kit for the MAX4374

Tools & Models

  • MAX4373H Macromodel
  • MAX4373H Orcad Library
  • MAX4373F Macromodel
  • MAX4373T Macromodel
  • MAX4073TLTR Test Circuit File
  • MAX4073TSTR Test Circuit File
  • MAX4373FGBW Test Circuit File
  • MAX4373FLTR Test Circuit File
  • MAX4373FSTR Test Circuit File
  • MAX4373HGBW Test Circuit File
  • MAX4373HLTR Test Circuit File
  • MAX4373HSTR Test Circuit File
  • MAX4373TGBW Test Circuit File
  • MAX4373TLTR Test Circuit File
  • MAX4373TSTR Test Circuit File
  • MAX4374FGBW Test Circuit File
  • MAX4374FLTR Test Circuit File
  • MAX4374FSTR Test Circuit File
  • MAX4374HGBW Test Circuit File
  • MAX4374HLTR Test Circuit File
  • MAX4374HSTR Test Circuit File
  • MAX4374TGBW Test Circuit File
  • MAX4374TLTR Test Circuit File
  • MAX4374TSTR Test Circuit File
  • MAX4375FGBW Test Circuit File
  • MAX4375FLTR Test Circuit File
  • MAX4375FSTR Test Circuit File
  • MAX4375HGBW Test Circuit File
  • MAX4375HLTR Test Circuit File
  • MAX4375HSTR Test Circuit File
  • MAX4375TGBW Test Circuit File
  • MAX4375TLTR Test Circuit File
  • MAX4375TSTR Test Circuit File
  • MAX4373T Orcad Library
  • MAX4373F Orcad Library
  • MAX4373F Orcad Library
  • MAX4373T Orcad Library
  • MAX4373H Orcad Library
  • MAX4373T Macromodel
  • MAX4373F Macromodel
  • MAX4373H Macromodel
  • MAX4374TGBW Test Circuit File
  • MAX4375FLTR Test Circuit File
  • MAX4073TSTR Test Circuit File
  • MAX4373TLTR Test Circuit File
  • MAX4374TSTR Test Circuit File
  • MAX4374HGBW Test Circuit File
  • MAX4375FSTR Test Circuit File
  • MAX4373FGBW Test Circuit File
  • MAX4375TSTR Test Circuit File
  • MAX4373FSTR Test Circuit File
  • MAX4375HSTR Test Circuit File
  • MAX4374TLTR Test Circuit File
  • MAX4375HGBW Test Circuit File
  • MAX4373TGBW Test Circuit File
  • MAX4373TSTR Test Circuit File
  • MAX4374FGBW Test Circuit File
  • MAX4373HGBW Test Circuit File
  • MAX4373FLTR Test Circuit File
  • MAX4374HSTR Test Circuit File
  • MAX4375TLTR Test Circuit File
  • MAX4375TGBW Test Circuit File
  • MAX4374HLTR Test Circuit File
  • MAX4373HSTR Test Circuit File
  • MAX4374FLTR Test Circuit File
  • MAX4375HLTR Test Circuit File
  • MAX4375FGBW Test Circuit File
  • MAX4073TLTR Test Circuit File
  • MAX4374FSTR Test Circuit File
  • MAX4373HLTR Test Circuit File
  • MAX6069C Orcad Library
  • Product Reliability Reports: MAX4373.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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