Datasheet

MAX5946
Dual PCI Express, Hot-Plug
Controller
6 _______________________________________________________________________________________
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_ = 10kΩ to 3.3VAUXIN, PWRGDA = 10kΩ to 3.3VAUXO_, T
A
= +25°C, unless otherwise noted, see the Typical
Application Circuit.)
12VIN UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX5946 toc10
TEMPERATURE (°C)
UVLO THRESHOLD (V)
6035-15 10
9.85
9.90
9.95
10.00
10.05
10.10
10.15
10.20
9.80
-40 85
3.3VAUXIN UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX5946 toc11
TEMPERATURE (°C)
UVLO THRESHOLD (V)
603510-15
2.62
2.64
2.66
2.68
2.70
2.60
-40 85
12V TURN-ON/OFF TIME
MAX5946 toc12
12G_
20V/div
PWRGD_
5V/div
ON_
5V/div
12V OUTPUT
10V/div
40ms/div
3.3V TURN-ON/OFF TIME
MAX5946 toc13
3.3G_
10V/div
PWRGD_
5V/div
ON_
5V/div
3.3V OUTPUT
5V/div
40ms/div
3.3V AUXILIARY TURN-ON/OFF TIME
MAX5946 toc14
40ms/div
3.3AUXO_
OUTPUT VOLTAGE
2V/div
AUXON_
2V/div
PWRGD
2V/div
12V POWER-UP
MAX5946 toc15
12V OUTPUT
10V/div
PWRGD_
5V/div
12VIN, 12V INPUT
10V/div
12G_
20V/div
40ms/div