MAX4373TEUA-T Maxim Integrated, MAX4373TEUA-T Datasheet

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MAX4373TEUA-T

Manufacturer Part Number
MAX4373TEUA-T
Description
Current Sense Amplifiers uPower High-Side Current-Sense Amp
Manufacturer
Maxim Integrated
Series
MAX4373, MAX4374, MAX4375r
Datasheet
The MAX4373/MAX4374/MAX4375 low-cost, micropow-
er, 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-detec-
tion 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 inte-
gration, resulting in a simple and compact current-
sense solution.
The MAX4373/MAX4374/MAX4375 operate from a sin-
gle +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.
19-1630; Rev 4; 1/11
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations appear at end of data sheet.
Notebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General-System/Board-Level Current Monitoring
Precision Current Sources
Low-Cost, Micropower, High-Side Current-Sense
________________________________________________________________ Maxim Integrated Products
Amplifier + Comparator + Reference ICs
General Description
Applications
♦ Current-Sense Amplifier plus Internal Comparator
♦ 50µA Supply Current
♦ Single +2.7V to +28V Operating Supply
♦ 1mV (max) Input Offset Voltage
♦ 2% (max) Full-Scale Accuracy
♦ Internal Bandgap Reference (±1.6% Accuracy)
♦ Latching Comparator Output
♦ Three Gain Versions Available (+20V/V, +50V/V,
♦ High Accuracy +2V to +28V Common-Mode
+ Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
MAX4373TEUA+
MAX4373TESA+
MAX4373FEUA+
MAX4373FESA+
MAX4373HEUA+
MAX4373HESA+
and Bandgap Reference with Improved Accuracy
+100V/V)
Range, Functional Down to 0V, Independent of
Supply Voltage
V
CC
PART
= 2.7V TO 28V
(UP TO 5V)
V
V
IN
PULL-UP
= 0 TO 28V
0.1µF
C1
R3
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
V
COUT
RESET
Ordering Information
CC
RS+
+ V
MAX4373
R
SENSE
SENSE
GND
-
RS-
PIN-
PACKAGE
8 µMAX
8 SO
8 µMAX
8 SO
8 µMAX
8 SO
OUT
CIN
I
LOAD
Features
BATTERY
R1
R2
LOAD/
GAIN
(V/V)
+100
+100
+20
+20
+50
+50
1

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MAX4373TEUA-T Summary of contents

Page 1

... Latching Comparator Output ♦ Three Gain Versions Available (+20V/V, +50V/V, +100V/V) ♦ High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage PART MAX4373TEUA+ MAX4373TESA+ MAX4373FEUA+ MAX4373FESA+ MAX4373HEUA+ MAX4373HESA+ + Denotes a lead(Pb)-free/RoHS-compliant package. Ordering Information continued at end of data sheet. ...

Page 2

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs ABSOLUTE MAXIMUM RATINGS V , RS+, RS- to GND ...........................................-0.3V to +30V CC OUT to GND ................................................-0.3V to the lesser of CIN1, CIN2, RESET to GND ........................-0.3V to the lesser ...

Page 3

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs ELECTRICAL CHARACTERISTICS (continued +2.7V to +28V +28V RS+ Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL -3dB Bandwidth ...

Page 4

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs ELECTRICAL CHARACTERISTICS (continued +2.7V to +28V +28V RS+ Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL Output High ...

Page 5

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs (V = +12V +12V 1MΩ, V RS+ CC LOAD otherwise noted.) TOTAL OUTPUT ERROR vs. SUPPLY VOLTAGE +50V +100V/V ...

Page 6

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs (V = +12V +12V 1MΩ, V RS+ CC LOAD otherwise noted.) LARGE-SIGNAL PULSE RESPONSE (A = +20V/V) V MAX4373 toc12 150mV 50mV 3V 1V 20µs/div COMMON-MODE ...

Page 7

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs (V = +12V +12V 1MΩ, V RS+ CC LOAD otherwise noted.) POWER-UP DELAY A = +20V OUTPUT 100µs/div COMPARATOR TRIP POINT vs. SUPPLY ...

Page 8

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs (V = +12V +12V 1MΩ, V RS+ CC LOAD otherwise noted.) COMPARATOR RESET VOLTAGE vs. SUPPLY VOLTAGE 2.0 1.8 1.6 1.4 1.2 1.0 0 ...

Page 9

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs PIN MAX4373 MAX4374/MAX4375 µMAX/SO µMAX — — ...

Page 10

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs Internal Comparator(s) The MAX4373/MAX4374/MAX4375 contain an open- drain output comparator for current limiting. The com- parator’s negative terminal is connected to the internal 600mV reference. The positive terminal is accessible ...

Page 11

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs + V - SENSE 28V IN R SENSE RS+ RS 2.7V TO 28V PULL-UP (UP TO 5V) MAX4375 R3 COUT1 ...

Page 12

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs TOP VIEW + RS+ OUT 2 7 RS- MAX4373 CIN1 3 6 COUT1 GND RESET 4 5 µMAX/SO Ordering Information (continued) PART TEMP RANGE MAX4374TEUB+ -40°C ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2011 Maxim Integrated Products ...

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