1A Current-Limited Switch for 2 USB Ports
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN = 5V, TA = +25°C, unless otherwise noted.)
CURRENT-LIMIT AND OC RESPONSE
MAX1922 toc10
5V
VIN AC-COUPLED
100mV/div
VOUT, 5V/div
0
VOC, 5V/div
0
IOUT, 1A/div
0
2ms/div
CURRENT-LIMIT RESPONSE
MAX1922 toc11
5V
VIN AC-COUPLED
500mV/div
0
VOUT, 5V/div
5V
VOC, 5V/div
IOUT, 2A/div
0
4µs/div
SWITCH TURN-ON TIME
MAX1922 toc12
SWITCH TURN-OFF TIME
MAX1922 toc13
VOUT, 5V/div
VOUT, 5V/div
0
0
VEN, 5V/div
VEN, 5V/div
0
0
5V
VOC, 5V/div
5V
VOC, 5V/div
IOUT,
500mA/div
0
20µs/div
IOUT,
500mA/div
0
1µs/div
STARTUP TIME
(TYPICAL USB APPLICATION)
MAX1922 toc14
VOUT 5V/div
0
FULL CURRENT LIMIT CHARGES CAPACITOR
VEN 5V/div
0
RESISTOR LOAD CURRENT
0
SHORT-CIRCUIT
CURRENT LIMIT
5V
1ms/div
IIN 1A/div
VOC 5A/div
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