MAX4372 Maxim, MAX4372 Datasheet
MAX4372
Manufacturer Part Number
MAX4372
Description
Low-Cost / SOT23 / Micropower / High-Side Current-Sense Amplifier with Voltage Output
Manufacturer
Maxim
Datasheet
1.MAX4372.pdf
(8 pages)
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The MAX4372 low-cost, precision, high-side current-
sense amplifier is available in a tiny, space-saving
SOT23-5 package. Offered in three gain versions (T =
+20V/V, F = +50V/V, and H = +100V/V), this device
operates from a single +2.7V to +28V supply and con-
sumes only 30µA. It features a voltage output that elimi-
nates the need for gain-setting resistors and is 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 bat-
tery-powered systems since it does not interfere with
the ground path of the battery charger. The input com-
mon-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 2-
cell battery pack in deep discharge.
The user can set the full-scale current reading by
choosing the device (T, F, or H) with the desired volt-
age gain and selecting the appropriate external sense
resistor. This capability offers a high level of integration
and flexibility, resulting in a simple and compact cur-
rent-sense solution. For higher bandwidth applications,
refer to the MAX4173T/F/H data sheet.
19-1548; Rev 0; 10/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
GND
OUT
V
CC
Power-Management Systems
General-System/Board-Level Current Monitoring
Notebook Computers
Portable/Battery-Powered Systems
Smart-Battery Packs/Chargers
Cell Phones
Precision-Current Sources
1
2
3
MAX4372T/F/H
Current-Sense Amplifier with Voltage Output
SOT23-5
Low-Cost, SOT23, Micropower, High-Side
________________________________________________________________ Maxim Integrated Products
4
5
RS-
RS+
General Description
TOP VIEW
Pin Configurations
GND
N.C.
OUT
V
CC
1
2
4
3
Applications
MAX4372T/F/H
SO
6
8
7
5
RS+
RS-
N.C.
N.C.
Note: Gain values are as follows: +20V/V for the T version,
+50V/V for the F version, and +100V/V for the H version.
MAX4372TEUK-T
MAX4372TESA
MAX4372FEUK-T -40°C to +85°C
MAX4372FESA
MAX4372HEUK-T
MAX4372HESA
Low-Cost, Compact Current-Sense Solution
30µA Supply Current
+2.7V to +28V Operating Supply
0.18% Full-Scale Accuracy
Low 1.5Ω Output Impedance
Three Gain Versions Available
Wide 0 to +28V Common-Mode Range,
Independent of Supply Voltage
Available in Space-Saving SOT23-5 Package
+2.7V TO +28V
CONVERTER
+20V/V (MAX4372T)
+50V/V (MAX4372F)
+100V/V (MAX4372H)
PART
A/D
0.1 F
V
CC
Typical Operating Circuit
GND
OUT
V
CC
TEMP. RANGE PIN-PACKAGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C 8 SO
-40°C to +85°C
-40°C to +85°C
MAX4372T/F/H
Ordering Information
RS+
RS-
R
SENSE
5 SOT23-5
5 SOT23-5
8 SO
8 SO
5 SOT23-5
0 TO 28V
V
IN
V
SENSE
I
LOAD
Features
BATTERY
LOAD/
MARK
ADIW
ADIU
ADIV
TOP
—
—
—
1
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