MAX4374：Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs

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

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.

Key Features

Integrated Current-Sensing Solution Simplifies High-Side Current Monitoring
- Current-Sense Amplifier plus Internal Comparator and Bandgap Reference with Improved 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

MAX4373, MAX4374, MAX4375: Typical Operating Circuit

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

DataSheet

title	Download file
MAX4373-MAX4375 Data Sheet	MAX4373-MAX4375.pdf

Parametrics

Part Number	Output Format	CMVR (V)	CMVR (V)	V_CC (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	Reference	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Output Format	min	max	min	max	typ	Bi-Dir. Curr. Sense	recomm.	max	Gain	max	@ -3dB	Comp- arators	Reference	Oper. Temp. (°C)	Package/Pins	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

Design kits & evaluation modules

MAX4374EVKIT

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4374FESD	No Longer Available	MAX4374FESD+	SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	No
MAX4374FESD+	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
MAX4374FESD+T	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
MAX4374FESD-T	No Longer Available	MAX4374FESD+T	N.SO;14 pin	-40°C to +85°C	See data sheet
MAX4374FEUB	No Longer Available	MAX4374FEUB+	µMAX,;10 pin;15.4 mm²	-40°C to +85°C	No
MAX4374FEUB+	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374FEUB+T	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374FEUB-T	No Longer Available	MAX4374FEUB+T	µMAX,;10 pin;15.4 mm²	-40°C to +85°C	No
MAX4374HESD	No Longer Available	MAX4374HESD+	SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	No
MAX4374HESD+	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4374HESD+T	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
MAX4374HESD-T	No Longer Available	MAX4374HESD+T	N.SO;14 pin	-40°C to +85°C	See data sheet
MAX4374HEUB	No Longer Available	MAX4374HEUB+	µMAX,;10 pin;15.4 mm²	-40°C to +85°C	No
MAX4374HEUB+	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374HEUB+T	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374HEUB-T	No Longer Available	MAX4374HEUB+T	uMAX;10 pin	-40°C to +85°C	See data sheet
MAX4374TESD	No Longer Available	MAX4374TESD+	SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	No
MAX4374TESD+	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
MAX4374TESD+T	Active		SOIC(N),;14 pin;54.2 mm²	-40°C to +85°C	Lead Free
MAX4374TESD-T	No Longer Available	MAX4374TESD+T	N.SO;14 pin	-40°C to +85°C	See data sheet
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4374TEUB	No Longer Available	MAX4374TEUB+	µMAX,;10 pin;15.4 mm²	-40°C to +85°C	No
MAX4374TEUB+	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374TEUB+T	Active		µMAX,;10 pin;15.4 mm²	-40°C to +85°C	Lead Free
MAX4374TEUB-T	No Longer Available	MAX4374TEUB+T	µMAX,;10 pin;15.4 mm²	-40°C to +85°C	No