Dual PCI Express, Hot-Plug
Controller
_______________________________________________________________________________________   9
Typical Operating Characteristics (continued)
(V
12VIN
= V
12SA+
= 12V, V
3.3VAUXIN
= V
3.3S_+
= V
ON_
= V
AUXON_
= V
INPUT_
= 3.3V, PRES-DET_ = GND, FON_ = PORADJ = TIM =
float, FAULT_ = 10k& to 3.3VAUXIN, PWRGDA = 10k& to 3.3VAUXO_, T
A
= +25癈, unless otherwise noted, see the Typical
Application Circuit.)
SHORT CIRCUIT ON 12V OUTPUT
MAX5946 toc28
12G_
20V/div
FAULT_
5V/div
12V OUTPUT CURRENT
25A/div
4祍/div
12V OUTPUT VOLTAGE
10V/div
0V
0V
0V
SHORT CIRCUIT ON 3.3V OUTPUT
MAX5946 toc29
3.3G_
5V/div
FAULT_
5V/div
3.3V OUTPUT CURRENT
2A/div
2ms/div
3.3V OUTPUT VOLTAGE
5V/div
SHORT CIRCUIT ON 3.3V OUTPUT
MAX5946 toc30
3.3G_
5V/div
FAULT_
5V/div
3.3V OUTPUT CURRENT
10A/div
2祍/div
3.3V OUTPUT VOLTAGE
5V/div
0V
SHORT CIRCUIT ON 3.3AUXO_
MAX5946 toc31
FAULT_
5V/div
3.3VAUXO_ OUTPUT CURRENT
500mA/div
2ms/div
3.3VAUXO_ OUTPUT VOLTAGE
2V/div
SHORT CIRCUIT ON 3.3VAUXO_
MAX5946 toc32
FAULT_
5V/div
3.3VAUXO_ OUTPUT CURRENT
5A/div
2祍/div
3.3VAUXO_ OUTPUT VOLTAGE
2V/div
POWER-UP INTO FAULT
(AUXILIARY SUPPLY)
MAX5946 toc33
3.3VAUXO_ OUTPUT VOLTAGE
2V/div
FAULT_
5V/div
3.3VAUXO_ OUTPUT CURRENT
500mA/div
4ms/div
AUXON_
5V/div
t
SU
R
LOAD
 = 4&
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