max5957letnt Maxim Integrated Products, Inc., max5957letnt Datasheet - Page 16

• Manufacturer Part Number: max5957letnt
• Description: Triple Pci Express, Hot-plug Controllers
• Manufacturer: Maxim Integrated Products, Inc.

Triple PCI Express, Hot-Plug Controllers
* PRES-DET_ high-to-low transition has a 4ms delay (t
Figure 2. Power-Up Timing, No Fault
16
Table 2. Control Logic Truth Table
3.3AUXIN
RISING
EDGE
V
______________________________________________________________________________________
V
PGTH3.3AUX
ON_,TH
ON_
High
High
Low
Low
X
X
PWRGD_ IS PULLED UP TO 3.3.
FAULT_ IS PULLED UP TO 3.3AUXIN.
V
V
PGTH12
PGTH3.3
AUXON_
High
High
Low
Low
X
X
t
POR_HL
FON_
High
High
High
High
High
Low
ON_, AUXON_
12G_, 3.3G_
12VO_, 3.3VO_
DEG
3.3VAUXO_
PWRGD_
FAULT_
).
PRES-DET
Figure 3. 12V Power-Up Timing (Turn-On into Output
Overcurrent/Short Circuit)
3.3VAUXIN
RISING
EDGE
Low*
Low*
Low*
Low*
High
PWRGD_ IS PULLED UP TO 3.3VAUXO_.
FAULT_ IS PULLED UP TO 3.3VAUXIN.
A FAULT ON THE 3.3V OUTPUT OR 3.3VAUXO_ OUTPUT PRODUCES SIMILAR RESULTS.
X
V
V
12ILIM,TH
ON_,TH
R
SENSE
12V_ AND 3.3V_
OUTPUTS
On
Off
Off
On
Off
On
2 x t
FAULT
3.3VAUXO_AUXILIARY
OUTPUTS
On
Off
Off
Off
On
On
ON_
12G_
12V OUTPUT
CURRENT
3.3VAUXO_
PWRGD_
FAULT_