MAX5959 Maxim Integrated Products, MAX5959 Datasheet - Page 17

• Manufacturer Part Number: MAX5959
• Description: (MAX5959 / MAX5960) Hot-Plug Controllers
• Manufacturer: Maxim Integrated Products

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* PRES-DET_ high-to-low transition has a 4ms delay (t
Figure 2. Power-Up Timing, No Fault
Table 2. Control Logic Truth Table
3.3AUXIN
RISING
EDGE
V
V
PGTH3.3AUX
ON_
High
High
ON_,TH
Low
Low
X
X
PWRGD_ IS PULLED UP TO 3.3.
FAULT_ IS PULLED UP TO 3.3AUXIN.
______________________________________________________________________________________
V
V
PGTH12
PGTH3.3
Quad PCI Express, Hot-Plug Controllers
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_
3.3VAUXO_
DEG
PWRGD_
FAULT_
).
PRES-DET
Figure 3. 12V Power-Up Timing (Turn-On into Output
Overcurrent/Short Circuit)
Low*
Low*
Low*
Low*
High
3.3VAUXIN
RISING
EDGE
X
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.
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_
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