Datasheet MAX4173 (Maxim)

AVAILABLE MAX4173
Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier General Description Features
The MAX4173 low-cost, precision, high-side current- o
Low-Cost, Compact Current-Sense Solution
sense amplifier is available in a tiny SOT23-6 package. It features a voltage output that eliminates the need for o
High Accuracy +2V to +28V Common-Mode
gain-setting resistors and it is ideal for today’s notebook
Range, Functional Down to 0V, Independent of
computers, cell phones, and other systems where cur-
Supply Voltage
rent monitoring is critical. High-side current monitoring o
Three Gain Versions Available
is especially useful in battery-powered systems, since it does not interfere with the ground path of the battery
+20V/V (MAX4173T)
charger. The input common-mode range of 0 to +28V is
+50V/V (MAX4173F)
independent of the supply voltage and ensures that the
+100V/V (MAX4173H)
current-sense feedback remains viable even when con- o
±0.5% Full-Scale Accuracy
nected to a battery in deep discharge. The MAX4173’s wide 1.7MHz bandwidth makes it suitable for use inside o
±3mV Input Offset Voltage (MAX4173T)
battery charger control loops. o
Wide 1.7MHz Bandwidth (MAX4173T)
The combination of three gain versions and a user- selectable external sense resistor sets the full-scale o
420µA Supply Current
current reading. This feature offers a high level of inte- o
Available in Space-Saving SOT23 Package
gration, resulting in a simple and compact current- sense solution. The MAX4173 operates from a single +3V to +28V sup-
Typical Operating Circuit
ply, 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 I V LOAD SENSE package. 0 TO +28V
Applications
RSENSE Notebook Computers RS+ +3V TO +28V RS- VCC Portable/Battery-Powered Systems 0.1µF
Functional Diagrams
Smart Battery Packs/Chargers Cell Phones MAX4173T/F/H Power-Management Systems A/D LOAD/ OUT General System/Board-Level Current Monitoring CONVERTER BATTERY GND PA Bias Control Precision Current Sources
Ordering Information PART GAIN (V/V) TEMP RANGE PIN-PACKAGE SOT TOP MARK
MAX4173TEUT+T 20 -40°C to +85°C 6 SOT23 AABN MAX4173TESA+ 20 -40°C to +85°C 8 SO — MAX4173FEUT+T 50 -40°C to +85°C 6 SOT23 AABO MAX4173FESA+ 50 -40°C to +85°C 8 SO — MAX4173HEUT+T 100 -40°C to +85°C 6 SOT23 AABP MAX4173HESA+ 100 -40°C to +85°C 8 SO —
Pin Configurations appear at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagrams continued at end of data sheet.
T = Tape and reel. UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-1434; Rev 5; 4/11