Current-Limited Switch for Two USB Ports
Typical Operating Characteristics (continued)
(Circuit of Figure 2, V = 5V, T = +25°C, unless otherwise noted.)
IN
A
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
NORMALIZED OUTPUT CURRENT
vs. OUTPUT VOLTAGE
OFF SWITCH CURRENT
vs. TEMPERATURE
1000
100
10
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
1.2
1.0
0.8
0.6
0.4
0.2
0
I
(1.75A)
LIMIT
EN = IN
= 0
I
= 850mA
OUT
V
OUT
SHORT-CIRCUIT CURRENT
1
0.1
0.01
-40
-15
10
35
60
85
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT VOLTAGE (V)
-40
-15
10
35
60
85
TEMPERATURE ( C)
TEMPERATURE ( C)
CURRENT-LIMIT RESPONSE
TURN-OFF TIME vs. TEMPERATURE
TURN-ON TIME vs. TEMPERATURE
MAX1930 toc09
160
140
120
100
80
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
I
= 850mA
OUT
I
= 850mA
OUT
OUT
OUT
C
= 0.1 F
5V
C
= 0.1 F
V
AC-COUPLED
IN
500mV/div
V
= 3V
IN
V
= 5V
IN
V
, 5V/div
0
0
OUT
60
V
= 5V
IN
V
= 3V
IN
40
5.0
4.5
4.0
20
I
, 2A/div
OUT
0
4 s/div
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE ( C)
TEMPERATURE ( C)
STARTUP TIME
(TYPICAL USB APPLICATION)
SWITCH TURN-ON TIME
SWITCH TURN-OFF TIME
MAX1930 toc10
MAX1930 toc12
MAX1930 toc11
V
V
5V/div
V
V
, 5V/div
OUT
OUT
V
, 5V/div
OUT
0
0
0
0
0
FULL CURRENT LIMIT CHARGES CAPACITOR
RESISTOR LOAD CURRENT
, 5V/div
EN
5V/div
EN
V
, 5V/div
EN
0
0
SHORT-CIRCUIT
CURRENT LIMIT
I
1A/div
IN
I
,
OUT
I
,
OUT
500mA/div
500mA/div
0
0
20 s/div
1ms/div
1 s/div
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
