MAX4173F, MAX4173H, MAX4173T Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

MAX4173F, MAX4173H, MAX4173T：Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

The MAX4173 low-cost, precision, high-side current-sense amplifier is available in a tiny SOT23-6 package. It features a voltage output that eliminates the need for gain-setting resistors and it is ideal for today's notebook computers, cell phones, and other systems where 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 input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery in deep discharge. The MAX4173's wide 1.7MHz bandwidth makes it suitable for use inside battery charger control loops. The combination of three gain versions and a user-selectable external sense resistor sets the full-scale current reading. This feature offers a high level of integration, resulting in a simple and compact current-sense solution. The MAX4173 operates from a single +3V to +28V supply, typically draws only 420µA of supply current over the extended operating temperature range (-40°C to +85°C), and is offered in the space-saving SOT23 package.

Key Features

Low-Cost, Compact Current-Sense Solution
High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
Three Gain Versions Available
- +20V/V (MAX4173T)
- +50V/V (MAX4173F)
- +100V/V (MAX4173H)
±0.5% Full-Scale Accuracy
±3mV Input Offset Voltage (MAX4173T)
Wide 1.7MHz Bandwidth (MAX4173T)
420µA Supply Current
Available in Space-Saving SOT23 Package

MAX4173F, MAX4173H, MAX4173T: Typical Operating Circuit

Applications/Uses

Cell Phones
General System/Board-Level Current Monitoring
Notebook Computers
PA Bias Control
Portable Battery-Powered Systems
Power-Management Systems
Precision Current Sources
Smart Battery Packs/Chargers

DataSheet

Title	Download file
MAX4173-MAX4173T Data Sheet	MAX4173-MAX4173T.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	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	Oper. Temp. (°C)	Package/Pins	See Notes
MAX4173	Voltage	0	28	3	28	420	No	150	3000	20 V/V 50 V/V 100 V/V	2.5	1200 1400 1700	0	-40 to +85	SOIC(N)/8 SOT/6	$1.13 @1k

Design kits & evaluation modules

MAX4173EVKIT

Quality and Environmental Data

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4173FESA	No Longer Available	MAX4173FESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX4173FESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4173FESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX4173FESA-T	No Longer Available	MAX4173FESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet
MAX4173FEUT	No Longer Available	MAX4173FEUT+	SOT,;6 pin;9 mm²	-40°C to +85°C	No
MAX4173FEUT+	Active		SOT,;6 pin;9 mm²	-40°C to +85°C	Lead Free
MAX4173FEUT+T	Active		SOT,;6 pin;9 mm²	-40°C to +85°C	Lead Free
MAX4173FEUT-T	No Longer Available	MAX4173FEUT+T	SOT,;6 pin;9 mm²	-40°C to +85°C	No