Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
Chip Information
V
IN
MAX1745
LOW-COST
SWITCHING
REGULATOR
0 TO +18V
V
SENSE
R
SENSE
+3V TO +28V
0.1µF
MAX4376
OUT
GND
LOAD/
BATTERY
RS+
V
CC
RS-
I
LOAD
MAX4376/MAX4377/MAX4378
MAX4376_ TRANSISTOR COUNT: 162
MAX4377_ TRANSISTOR COUNT: 324
MAX4378_ TRANSISTOR COUNT: 648
PROCESS: BiCMOS
Figure 3. Current Source
Pin Configurations (continued)
TOP VIEW
V
CC
1
N.C.
2
GND
3
8
RS+
N.C.
RS-
N.C.
OUT1
1
RS1-
2
RS1+
GND
3
4
8
V
CC
OUT2
RS2-
RS2+
OUT1
1
RS1-
2
RS1+
3
14
OUT4
MAX4376
7
6
5
MAX4377
7
6
5
MAX4378
13
RS4-
12
RS4+
11
GND
10
RS3+
9
8
RS3-
OUT3
OUT
4
V
CC
4
RS2+
5
SO
µMAX/SO
RS2-
6
OUT2
7
SO/TSSOP
Ordering Information (continued)
PART
MAX4377
T AUA
MAX4377FAUA
MAX4377HAUA
MAX4377TASA
MAX4377FASA
MAX4377HASA
MAX4378
T AUD
MAX4378FAUD
MAX4378HAUD
MAX4378TASD
MAX4378FASD
MAX4378HASD
GAIN
(+V/V)
20
50
100
20
50
100
20
50
100
20
50
100
TEMP
RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
8 µMAX
8 µMAX
8 µMAX
8 SO
8 SO
8 SO
14 TSSOP
14 TSSOP
14 TSSOP
14 SO
14 SO
14 SO
TOP
MARK
—
—
—
—
—
—
—
—
—
—
—
—
Typical Operating Circuit
0 TO +28V
V
SENSE
R
SENSE
+3V TO +28V
0.1µF
MAX4376T/F/H
A/D
CONVERTER
OUT
GND
LOAD/
BATTERY
RS+
V
CC
RS-
I
LOAD
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.
9
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Printed USA
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