MAX4373 Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs

MAX4373：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

Quality and Environmental Data

MAX4373.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4373FESA	No Longer Available	MAX4373FESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX4373FESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4373FESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4373FESA-T	No Longer Available	MAX4373FESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet
MAX4373FEUA	No Longer Available	MAX4373FEUA+	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX4373FEUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373FEUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373FEUA-T	No Longer Available	MAX4373FEUA+T	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX4373HESA	No Longer Available	MAX4373HESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX4373HESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4373HESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4373HESA-T	No Longer Available	MAX4373HESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet
MAX4373HEUA	No Longer Available	MAX4373HEUA+	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX4373HEUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373HEUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373HEUA-T	No Longer Available	MAX4373HEUA+T	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX4373TESA	No Longer Available	MAX4373TESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX4373TESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4373TESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4373TESA-T	No Longer Available	MAX4373TESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4373TEUA	No Longer Available	MAX4373TEUA+	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX4373TEUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373TEUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX4373TEUA-T	No Longer Available	MAX4373TEUA+T	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No

MAX4373-MAX4375.pdf MAX4375

MAX4373.pdf MAX4373