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PDF MAX4375FESD Data sheet ( Hoja de datos )
| Número de pieza | MAX4375FESD | |
| Descripción | Low-Cost / Micropower / High-Side Current-Sense Amplifier Comparator Reference ICs | |
| Fabricantes | Maxim Integrated | |
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19-1630; Rev 0; 3/00
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
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
Pin Configurations appear at end of data sheet.
Features
o Current-Sense Amplifier plus Internal Comparator
and Bandgap Reference
o 50µA Supply Current
o Single +2.7V to +28V Operating Supply
o 0.66% Full-Scale Accuracy
o Internal Bandgap Reference
o Latching Comparator Output
o Three Gain Versions Available (+20V/V, +50V/V,
+100V/V)
o Wide 0 to +28V Common-Mode Range,
Independent of Supply Voltage
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
Ordering Information continues at end of data sheet.
Typical Operating Circuit
VIN = 0 TO 28V
VCC = 2.7V TO 28V
C1
0.1µF
VPULL-UP = 5V
R3
+ VSENSE -
RSENSE
RS+
VCC
RS-
ILOAD
LOAD/
BATTERY
MAX4373
OUT
COUT
RESET
GND
CIN
R1
R2
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
Typical Operating Characteristics (continued)
(VRS+ = +12V, VCC = +12V, RLOAD = 1MΩ, VRESET = 0, VSENSE = 100mV, VPULL-UP = +5V, RPULL-UP = 10kΩ, TA = +25°C, unless
otherwise noted.)
TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGE
5
4
3 AV = +100V/V AV = +50V/V
2
1
0 AV = +20V/V
-1
-2
-3
-4
-5
2 4 6 8 10 12 14 16 18 20 22 24 26 28
SUPPLY VOLTAGE (V)
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
1.5
VCC = +5.5V
1.0
0.5
AV = +100V/V
0
-0.5
AV = +20V/V
-1.0
AV = +50V/V
-1.5
-2.0
-2.5
0
25 50 75 100 125 150
VSENSE (mV)
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
AV = +100V/V
AV = +20V/V
AV = +50V/V
25 50 75 100 125 150
VSENSE (mV)
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
3.0
VCC = +28V
2.5
AV = +100V/V
2.0
AV = +50V/V
1.5
1.0 AV = +20V/V
TOTAL OUTPUT ERROR
vs. COMMON-MODE VOLTAGE
12
10
8 AV = +100V/V
6
4
2 AV = +50V/V
0.5
0
0 25 50 75 100 125 150
VSENSE (mV)
0
-2 AV = +20V/V
2 4 6 8 10 12 14 16 18 20 22 24 26 28
COMMON-MODE VOLTAGE (V)
SMALL-SIGNAL PULSE RESPONSE
(AV = +20V/V)
MAX4373 toc09
SMALL-SIGNAL PULSE RESPONSE
(AV = +50V/V)
MAX4373 toc10
SMALL-SIGNAL PULSE RESPONSE
(AV = +100V/V)
MAX4373 toc11
30mV
10mV
600mV
200mV
30mV
10mV
1.5V
500mV
30mV
10mV
3V
1V
20µs/div
20µs/div
20µs/div
_______________________________________________________________________________________ 5
5 Page 
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
VIN = 0 TO 28V
VCC = 2.7V TO 28V
VPULL-UP = 5V
R3
+ VSENSE -
ILOAD
RSENSE
RS+
VCC
RS-
OUT
LOAD
MAX4375
COUT1
CIN2
R1
R2
R4
COUT2
CIN1
VCC RESET
GND
R5
Figure 3. MAX4375 Window Detector
Ordering Information (continued)
PART
MAX4374TEUB
MAX4374TESD
MAX4374FEUB
MAX4374FESD
MAX4374HEUB
MAX4374HESD
MAX4375TEUB
MAX4375TESD
MAX4375FEUB
MAX4375FESD
MAX4375HEUB
MAX4375HESD
TEMP. RANGE
-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
-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
PIN-
PACKAGE
10 µMAX
14 SO
10 µMAX
14 SO
10 µMAX
14 SO
10 µMAX
14 SO
10 µMAX
14 SO
10 µMAX
14 SO
GAIN
(V/V)
+20
+20
+50
+50
+100
+100
+20
+20
+50
+50
+100
+100
___________________Chip Information
TRANSISTOR COUNT: 390
SUBSTRATE CONNECTED TO GND
TOP VIEW
VCC 1
OUT 2
CIN1 3
GND 4
MAX4373
8 RS+
7 RS-
6 COUT1
5 RESET
µMAX/SO
VCC 1
OUT 2
CIN1 3
CIN2 4
GND 5
MAX4374
MAX4375
µMAX
10 RS+
9 RS-
8 COUT1
7 COUT2
6 RESET
Pin Configurations
VCC 1
OUT 2
N.C. 3
CIN1 4
CIN2 5
N.C. 6
GND 7
MAX4374
MAX4375
SO
14 RS+
13 RS-
12 N.C.
11 COUT1
10 COUT2
9 N.C.
8 RESET
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX4375FESD.PDF ] | |
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