Single PCI Express, Hot-Plug
Controller
_______________________________________________________________________________________   7
Typical Operating Characteristics (continued)
(V
12VIN
= V
12S+
= 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, PWRGD = 10k& to 3.3VAUXO, T
A
= +25癈, unless otherwise noted, see the Typical Application
Circuit.)
3.3V INPUT/3.3V AUXILIARY INPUT
POWER-UP
MAX5954 toc16
3.3V OUTPUT
5V/div
PWRGD
5V/div
3.3VAUXO
5V/div
3.3G
10V/div
100ms/div
3.3S+
5V/div
TURN-ON DELAY 3.3V OUTPUT AND
3.3V AUXILIARY OUTPUT
MAX5954 toc17
4ms/div
5V/div
5V/div
5V/div
5V/div
10V/div
3.3VAUXO
OUTPUT VOLTAGE
3.3 VOLTAGE
3.3 INPUT,
3.3VAUXIN
3.3G
PWRGD
FAULT CONDITION ON 12V OUTPUT
(AUTORESTART OPTION MAX5954A)
MAX5954 toc18
12G
20V/div
FAULT
5V/div
12V OUTPUT CURRENT
5A/div
100ms/div
12V OUTPUT VOLTAGE
10V/div
t
RESTART
R
LOAD
 STEP TO 1.5&
FAULT CONDITION ON 3.3V OUTPUT
(AUTORESTART OPTION MAX5954A)
MAX5954 toc19
3.3G
10V/div
FAULT
5V/div
3.3V MAIN OUTPUT CURRENT
2A/div
100ms/div
3.3V OUTPUT VOLTAGE
5V/div
t
RESTART
R
LOAD
 STEP TO 0.5&
FAULT CONDITION ON AUXILIARY OUTPUT
(AUTORESTART OPTION MAX5954A)
MAX5954 toc20
FAULT
2V/div
3.3VAUXO OUTPUT CURRENT
500mA/div
100ms/div
3.3VAUXO OUTPUT VOLTAGE
2V/div
t
RESTART
R
LOAD
 STEP TO 4&
FAULT CONDITION ON 12V OUTPUT
(LATCH OPTION MAX5954L)
MAX5954 toc21
12G
20V/div
FAULT
5V/div
12V OUTPUT CURRENT
5A/div
100ms/div
12V OUTPUT VOLTAGE
10V/div
R
LOAD
 STEP TO 1.5&
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