MAX4374

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
Part Number Output Format CMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. Sense VSENSE_FS
(mV)
VOS @25°C
(µV)
Gain Gain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
Reference Oper. Temp.
(°C)
Package/Pins Budgetary
Price
min max min max typ recomm. max max @ -3dB See Notes
MAX4373  Voltage 0 28 2.7 28 50 No
100
150
1000
20 V/V
50 V/V
100 V/V
1.7
110
120
200
1 Bandgap -40 to +85
µMAX/8
SOIC(N)/8
$1.48 @1k
MAX4374  2
µMAX/10
SOIC(N)/14
$1.13 @1k
MAX4375  2
µMAX/10
SOIC(N)/14
$1.13 @1k
See All Current Sense Amplifiers (47)
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

MAX4374F Macromodel
MAX4374T Macromodel
MAX4073TLTR Test Circuit File
MAX4073TSTR Test Circuit File
MAX4373FLTR Test Circuit File
MAX4373TGBW Test Circuit File
MAX4374FSTR Test Circuit File
MAX4374TGBW Test Circuit File
MAX4375FSTR Test Circuit File
MAX4373FGBW Test Circuit File
MAX4373FSTR Test Circuit File
MAX4373HGBW Test Circuit File
MAX4373HLTR Test Circuit File
MAX4373HSTR Test Circuit File
MAX4373TLTR Test Circuit File
MAX4373TSTR Test Circuit File
MAX4374FGBW Test Circuit File
MAX4374FLTR Test Circuit File
MAX4374HGBW Test Circuit File
MAX4374HLTR Test Circuit File
MAX4374HSTR Test Circuit File
MAX4374TLTR Test Circuit File
MAX4374TSTR Test Circuit File
MAX4375FGBW Test Circuit File
MAX4375FLTR Test Circuit File
MAX4375HGBW Test Circuit File
MAX4375HLTR Test Circuit File
MAX4375HSTR Test Circuit File
MAX4375TGBW Test Circuit File
MAX4375TSTR Test Circuit File
MAX4374F Orcad Library
MAX4374H Orcad Library
MAX4374H Macromodel
MAX4375TLTR Test Circuit File
MAX4374T Orcad Library

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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 >
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