7
FN9104.5
December 3, 2015
Open load detection can be accomplished by monitoring
the ISEN pins. Although gated off, the external FET I
DSS
will
cause the ISEN pin to float above ground to some voltage
when there is no attached load. If this is not desired, 5k
resistors from the xISEN pins to ground will prevent the
outputs from floating when the external switch FETs are
disabled and the outputs are open.
For PCI-Express applications, the ISL6161 and the
ISL6118 provide the fundamental hotswap function for the
+12V and +3.3V main rails and the +3.3V aux respectively,
as shown in the “PCI-Express Implementation of ISL6161
and ISL6118” on page 10.
Typical Performance Curves
FIGURE 2. SUPPLY CURRENT
FIGURE 3. R
ILIM
SOURCE CURRENT
FIGURE 4. C
TIM
CURRENT SOURCE
FIGURE 5. C
TIM
OC VOLTAGE THRESHOLD
8.2
8.0
7.8
7.6
7.4
7.2
-40 -200 20406080
TEMPERATURE (¬×C
8.4
SUPPLY CURRENT (mA)
-30 -10 10 30 50 70
104
103
-40 -20 0 20 40 60 80
102
70503010-10-30
105
TEMPERATURE (¬×C
CURRENT (µA
-40 -20 0 20 40 60-30 -10 10 30 50 70 80
10.7
10.6
10.5
10.4
10.3
C
TIM
CURRENT SOURCE (µA
TEMPERATURE (¬×C
-40 -20 0 20 40 60-30 -10 10 30 50 70 80
2.04
2.02
2.00
1.98
1.96
1.94
C
TIM
OC VOLTAGE THRESHOLD (V)
TEMPERATURE (¬×C
ISL6161
