ISL6185 INTERSIL [Intersil Corporation], ISL6185 Datasheet - Page 10

• Manufacturer Part Number: ISL6185
• Description: Dual USB Port Power Supply Controller
• Manufacturer: INTERSIL [Intersil Corporation]

Turn-off Time Delay
During operation, once an OC condition is detected
the output is current limited for ~12ms to allow
transient OC conditions to pass. If still in current limit
and after the current limit period has elapsed, the
output is then turned off and the fault is reported by
pulling the corresponding FAULT low. The internal
12ms timer starts upon current limiting and is
independent of ambient or IC thermal conditions
providing more consistent operation over the entire
temp range.
Latchoff Restart/Auto-Restart Start
After turn-off, with the latch off options both the
output and the FAULT signal are latched low until
Typical Performance Curves
FIGURE 3. 0.6A CONTINUOUS CURRENT
FIGURE 1. SWITCH ON-RESISTANCE AT 0.5A
150
140
130
120
110
100
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
90
80
70
60
50
-40
-40
5V I
5V I
3.3V I
5V I
3.3V I
CHARACTERISTICS
SC
LIM
-25
TRIP
-25
LIM
TRIP
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
10
25
25
45
45
75
75
V
V
3.3V I
IN
IN
V
85
85
IN
= 3.3V
= 2.5V
= 5V
SC
115
115
ISL6185
ISL6185
reset by the enable signal being de-asserted at which
time the FAULT signal will clear and the IC is ready for
enable to assert. On the auto restart options the
ISL6185 will attempt to periodically turn-on the
output at approximately 1s intervals as long as the
enable is asserted. If the OC condition remains
indefinitely so will the fault indication and the restart
attempts until such time that the thermal protection
feature is invoked increasing the restart period.
Active Output Pull-down
Another ISL6185 feature is the 10kΩ active pull-down on
the outputs to <60mV above GND when the device is
disabled ensuring discharge of the load.
FIGURE 4. 1.1A CONTINUOUS CURRENT
FIGURE 2. NORMALIZED SWITCH RESISTANCE
1.3
1.2
1.1
1.0
0.9
0.8
0.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
-40
-40
5V I
3.3V I
5V I
3.3V I
CHARACTERISTICS
LIM
TRIP
-25
-25
LIM
TRIP
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
25
25
45
45
75
75
3.3V I
October 22, 2010
85
5V I
85
SC
SC
FN6937.0
115
115