Maxim > Products > Amplifiers and Comparators > MAX4373, MAX4374, MAX4375

MAX4373, MAX4374, MAX4375

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

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

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

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.

Data Sheet

Download	Rev 4	(PDF, 292kB)
E-Mail

An evaluation kit is available: MAX4374EVKIT

Key Features

Current-Sense Amplifier plus Internal Comparator and Bandgap Reference with Improved Accuracy
50µA Supply Current
Single +2.7V to +28V Operating Supply
1mV (max) Input Offset Voltage
2% (max) Full-Scale Accuracy
Internal Bandgap Reference (±1.6% Accuracy)
Latching Comparator Output
Three Gain Versions Available (+20V/V, +50V/V, +100V/V)
High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage

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

Key Specifications:

Current Sense Amplifiers

Part Number

CMVR
(V)

V_CC
(V)

I_CC
(µA)

Bi-Dir. Curr. Sense

V_{SENSE_FS}
(mV)

V_OS @25°C
(µV)

Gain

Gain Accuracy @25°C
(%)

BW
(kHz)

Comp-
arators

Oper. Temp.
(°C)

Package/Pins

Budgetary Price

min

max

min

max

typ

recomm.

max

@ -3dB

See Notes

MAX4373

2.7

100

150

1000

20 V/V

50 V/V

100 V/V

1.7

110

120

200

-40 to +85

MAX4374

MAX4375

See All Current Sense Amplifiers (36)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 621		Simple Circuit Charges Lead-Acid Batteries
Tutorial 746		High-Side Current-Sense Measurement: Circuits and Principles
Application Note 1084		High-Side Current Sensor Has Period Output
Application Note 2015		Overcurrent/Overdischarge Protection for Lead-Acid Batteries
Application Note 3195		Add Fault Protection to 4-20mA Loop Supply
Application Note 3883		Practical Considerations for Advanced Current Sensing in High-Reliability Systems
Application Note 3888		Performance of Current-Sense Amplifiers with Input Series Resistors
Application Note 3948		Simple, Latched Overcurrent Fault Detector Has Fast Response Time
Application Note 4415		High-Side Current Amplifier Forms 28V Circuit Breaker

Product Guides

Amplifiers and Comparators (PDF)

Reliability Reports

Reliability Report:	MAX4373.pdf MAX4375.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

MAX4073TLTR Test Circuit File

MAX4073TSTR Test Circuit File

MAX4373F Macromodel

MAX4373F Orcad Library

MAX4373FGBW Test Circuit File

MAX4373FLTR Test Circuit File

MAX4373FSTR Test Circuit File

MAX4373H Macromodel

MAX4373H Orcad Library

MAX4373HGBW Test Circuit File

MAX4373HLTR Test Circuit File

MAX4373HSTR Test Circuit File

MAX4373T Macromodel

MAX4373T Orcad Library

MAX4373TGBW Test Circuit File

MAX4373TLTR Test Circuit File

MAX4373TSTR Test Circuit File

MAX4374F Macromodel

MAX4374F Orcad Library

MAX4374FGBW Test Circuit File

MAX4374FLTR Test Circuit File

MAX4374FSTR Test Circuit File

MAX4374H Macromodel

MAX4374H Orcad Library

MAX4374HGBW Test Circuit File

MAX4374HLTR Test Circuit File

MAX4374HSTR Test Circuit File

MAX4374T Macromodel

MAX4374T Orcad Library

MAX4374TGBW Test Circuit File

MAX4374TLTR Test Circuit File

MAX4374TSTR Test Circuit File

MAX4375F Macromodel

MAX4375F Orcad Library

MAX4375FGBW Test Circuit File

MAX4375FLTR Test Circuit File

MAX4375FSTR Test Circuit File

MAX4375H Macromodel

MAX4375H Orcad Library

MAX4375HGBW Test Circuit File

MAX4375HLTR Test Circuit File

MAX4375HSTR Test Circuit File

MAX4375T Macromodel

MAX4375T Orcad Library

MAX4375TGBW Test Circuit File

MAX4375TLTR Test Circuit File

MAX4375TSTR Test Circuit File

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Devices: 51-73 / 73

<-- Previous 1 2 Next -->

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4375FESD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375FESD+T			Active	N.SO;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX4375FESD-T			Active	N.SO;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX4375FEUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375FEUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375FEUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375FEUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375HESD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375HESD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375HESD+T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4375HESD-T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375HEUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375HEUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375HEUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375HEUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375TESD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4375TESD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375TESD+T			Active	N.SO;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX4375TESD-T			Active	N.SO;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX4375TEUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4375TEUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375TEUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4375TEUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing:21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Devices: 51-73 / 73

<-- Previous 1 2 Next -->

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Notes and Comments

Low-cost, micropower, high-side current-sense amplifier includes two comparators and a reference, 50µA supply current

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See All Current Sense Amplifiers (36 Products)

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Evaluation Kits

MAX4374EVKIT

Evaluation Kit for the MAX4374

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