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MAX4374TESD+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
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.
Applications
Notebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General-System/Board-Level Current Monitoring
Precision Current Sources
Features
♦ Current-Sense Amplifier plus Internal Comparator
and Bandgap Reference with Improved Accuracy
♦ 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,
+100V/V)
♦ High Accuracy +2V to +28V Common-Mode
Range, Functional Down to 0V, Independent of
Supply Voltage
MAX4373/MAX4374/MAX4375
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
________________________________________________________________
Maxim Integrated Products
1
MAX4373
RS-RS+
OUT
CIN
LOAD/
BATTERY
V
CC
= 2.7V TO 28V
V
IN
= 0 TO 28V
GND
V
CC
R
SENSE
+ V
SENSE
-
I
LOAD
V
PULL-UP
(UP TO 5V)
R3
COUT
C1
0.1µF
R2
R1
RESET
Typical Operating Circuit
19-1630; Rev 4; 1/11
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.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE
GAIN
(V/V)
MAX4373TEUA+ -40°C to +85°C 8 µMAX +20
MAX4373TESA+ -40°C to +85°C 8 SO +20
MAX4373FEUA+ -40°C to +85°C 8 µMAX +50
MAX4373FESA+ -40°C to +85°C 8 SO +50
MAX4373HEUA+ -40°C to +85°C 8 µMAX +100
MAX4373HESA+ -40°C to +85°C 8 SO +100
µMAX is a registered trademark of Maxim Integrated Products, Inc.
EVALUATION KIT
AVAILABLE
MAX4373/MAX4374/MAX4375
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +28V, V
RS+
= 0 to +28V, V
SENSE
= 0V, V
RESET
= 0V, R
LOAD
= 1MΩ, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, RS+, RS- to GND ...........................................-0.3V to +30V
OUT to GND ................................................-0.3V to the lesser of
(V
CC
+ 0.3V) or +15V
CIN1, CIN2, RESET to GND ........................-0.3V to the lesser of
(V
CC
+ 0.3V) or +12V
Differential Input Voltage (V
RS
+ - V
RS
-)..............................±0.3V
COUT1, COUT2 to GND........................................-0.3V to +6.0V
Current into Any Pin..........................................................±10mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
14-Pin SO (derate 8.3mW/°C above +70°C)................667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
mV
PARAMETER SYMBOL MIN TYP MAX UNITS
-25 2.0
Input Bias Current
I
RS+
0 2.5
µA
Leakage Current I
RS+,
I
RS-
±0.015 ±0.5 µA
Supply Current I
CC
50 100 µA
I
RS-
04
-50 4
Full-Scale Sense Voltage
(Note 4)
V
SENSE
150 170
mV
100 120
Common-Mode Input Range
(Note 3)
Operating Voltage Range
(Note 2)
V
CC
2.7 28 V
V
CMR
028V
Common-Mode Rejection CMR 85 dB
OUT Voltage High
V
CC -
V
OH
0.25 V
CONDITIONS
V
RS+
≤ 2V
V
RS+
> 2V
V
CC
= 0V, V
RS+
= 28V
V
RS+
> 2V, V
SENSE
= 5mV
V
RS+
> 2V
V
RS+
≤ 2V
V
CC
= 2.7V, I
OUT
= -500µA, V
RS+
= 12V
Gain = +20V/V, +50V/V, V
RS+
= 12V
Gain = +100V/V, V
RS+
= 12V
V
RS+
> 2V
Input Offset Voltage V
OS
0.1 1
V
CC
= V
RS+
= 12V
(Note 11)
T
A
= +25°C
T
A
= T
MIN
to T
MAX
2
8.5 65I
OUT
= 100µA
I
OUT
= 10µA
OUT Voltage Low V
OUT
2.5
mV
V
CC
= 2.7V,
V
RS+
= 12V
±0.30 ±2T
A
= +25°C
V
SENSE
=
100mV
(Note 6)
±3
V
CC
= 12V,
V
RS+
= 12V
T
A
= T
MIN
to T
MAX
±0.35 ±2
V
CC
= 28V,
V
RS+
= 28V
T
A
= +25°C
±3T
A
= T
MIN
to T
MAX
±5.0V
CC
= 12V, V
RS+
= 0.1V
V
SENSE
= 6.25mV, V
CC
= 12V,
V
RS+
= 12V (Note 7)
Total OUT Voltage Error
(Note 5)
V
OUT
±5.0
%
MAX4373/MAX4374/MAX4375
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +28V, V
RS+
= 0 to +28V, V
SENSE
= 0V, V
RESET
= 0V, R
LOAD
= 1MΩ, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
±0.3 ±1.7
±2.7T
A
= -40°C to +85°C
T
A
= +25°C
V
SENSE
=
20mV to 100mV,
V
CC
= 12V, V
RS+
=
12V, Gain = 100
Output Low Voltage V
OL
0.6 VI
SINK
= 1mA
Propagation Delay 4 µs
C
L
= 10pF, R
L
= 10kΩ pull-up to 5V,
5mV of overdrive
Input Bias Current I
B
±2.2 ±15 nA
Comparator Hysteresis -9 mV
0.1 ms
Saturation Recovery Time
(Note 8)
V
CC
= 12V, V
RS+
= 12V, C
LOAD
= 10pF
dB
ms
Power-Supply Rejection
Power-Up Time to 1% of Final
Value
PSR
20
V
SENSE
= 100mV to
6.25mV
V
SENSE
= 6.25mV to
100mV
±2.7T
A
= -40°C to +85°C
T
A
= +25°C
+50
+100
MAX437_F
MAX437_H
V
SENSE
= 6.25mV
V
SENSE
= 100mV,
Gain = +100V/V
V
SENSE
= 100mV,
Gain = +50V/V
V
SENSE
= 100mV,
Gain = +20V/V
50
110
120
PARAMETER SYMBOL MIN TYP MAX UNITS
72 87
OUT Output Resistance R
OUT
1.5 Ω
Capacitive Load Stability 1000 pF
OUT Settling Time to 1% of
Final Value
20
µs
0.5
Comparator Threshold V
TH
590 600 610
mV
Gain
-3dB Bandwidth BW
200
kHz
A
V
+20
V/V
Gain Accuracy ∆A
V
±0.3 ±1.7
%
CONDITIONS
V
OUT
= 2V, V
RS+
> 2V
V
SENSE
= 100mV
No sustained oscillations
Gain = +20V/V,
V
CC
= 12V,
V
RS+
= 12V,
C
LOAD
= 10pF
V
SENSE
= 100mV, C
LOAD
= 10pF,
V
CC
= 12V, V
RS+
= 12V
T
A
= +25°C
V
RS+
= 12V,
V
CC
= 12V,
C
LOAD
= 10pF
MAX437_T
V
SENSE
=
20mV to 150mV;
V
CC
= 12V; V
RS+
=
12V; Gain = 20, 50
586 614T
A
= T
MIN
to T
MAX
COMPARATOR (Note 9)
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX4374TESD+T

Mfr. #:
Buy MAX4374TESD+T
Manufacturer:
Maxim Integrated
Description:
Current Sense Amplifiers uPower High-Side Current-Sense Amp
Lifecycle:
New from this manufacturer.
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