1A Current-Limited Switch for 2 USB Ports
MAX1922
Typical Operating Characteristics
(Circuit of Figure 2, V
IN
= 5V, T
A
= +25°C, unless otherwise noted.)
QUIESCENT CURRENT vs. INPUT VOLTAGE
MAX1922 toc01
QUIESCENT CURRENT vs. TEMPERATURE
MAX1922 toc02
OFF SUPPLY CURRENT
vs. TEMPERATURE
EN = IN
OUT = OPEN
OFF SUPPLY CURRENT (nA)
10
MAX1922 toc03
20
18
QUIESCENT CURRENT (μA)
16
14
12
10
8
6
4
2
0
V
EN
= 0
I
OUT
= 0
18.0
I
OUT
= 0
17.5
QUIESCENT CURRENT (μA)
17.0
16.5
16.0
15.5
15.0
14.5
14.0
V
IN
= 3V
V
IN
= 5V
100
1
0.1
0.01
-40
-15
10
35
60
85
-40
-15
TEMPERATURE (°C)
10
35
TEMPERATURE (°C)
60
85
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
OFF SWITCH CURRENT
vs. TEMPERATURE
MAX1922 toc04
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX1922 toc05
NORMALIZED OUTPUT CURRENT
vs. OUTPUT VOLTAGE
I
LIMIT
(1.75A)
MAX1922 toc06
1000
EN = IN
V
OUT
= 0
OFF SWITCH CURRENT (nA)
100
1.4
1.3
1.2
NORMALIZED R
ON
1.1
1.0
0.9
0.8
0.7
I
OUT
= 850mA
1.2
NORMALIZED OUTPUT CURRENT
1.0
0.8
0.6
10
1
SHORT-CIRCUIT CURRENT
0.4
0.2
0
0.1
0.6
0.5
0.01
-40
-15
10
35
TEMPERATURE (°C)
60
85
0.4
-40
-15
10
35
60
85
TEMPERATURE (°C)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT VOLTAGE (V)
TURN-ON TIME vs. TEMPERATURE
140
120
TURN-ON TIME (μs)
V
IN
= 3V
100
80
60
40
20
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
V
IN
= 5V
I
OUT
= 850mA
C
OUT
= 0.1μF
MAX1922 toc07
TURN-OFF TIME vs. TEMPERATURE
MAX1922 toc08
OC BLANKING TIMEOUT
vs. TEMPERATURE
14
OC BLANKING TIMEOUT (ms)
13
12
11
10
9
8
7
6
5
V
IN
= 3V OR 5V
I
OUT
= 1.75A
MAX1922 toc09
160
9.0
8.5
8.0
TURN-OFF TIME (μs)
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
-40
-15
10
35
60
V
IN
= 3V
V
IN
= 5V
I
OUT
= 850mA
C
OUT
= 0.1μF
15
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
