MAX4375

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 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)
Comp-
arators
ReferenceOper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.maxmax@ -3dBSee Notes
MAX4373 Voltage0282.72850No
100
150
1000
20 V/V
50 V/V
100 V/V
1.7
110
120
200
1Bandgap-40 to +85
µMAX/8
SOIC(N)/8
$1.48 @1k
MAX4374 2
µMAX/10
SOIC(N)/14
uMAX/8
uMAX/10
$1.13 @1k
MAX4375 2
µMAX/10
SOIC(N)/14
uMAX/8
uMAX/10
$1.13 @1k
See All Current Sense Amplifiers (48)
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.

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 >
Environmental Management System >

Related Resources


MAX40018
Dual nanoPower Op Amps in Tiny WLP and TDFN Packages

  • Ultra-Low Power Preserves Battery Life
  • Single 1.7V to 5.5V Supply Voltage Range
  • Tiny Packages Save Board Space

MAX40016
4-Decade Current Sense Amplifier with Integrated RSENSE

  • Integrated Current Sense Element Saves The Space and Cost of Expensive Precision Sense Resistors
  • 4-Decade Measurement Range
  • Withstands Overloads to 4A