MAX5915/MAX5915A/MAX5916/MAX5916A
Dual PCI 2.2 Hot-Swap Controllers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
-12VIN
= -12V, V
+12VIN
= +12V, V
3.3VAUXIN
= +3.3V, V
ON_
= V
AUXON_
= +5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= +25°C, I
D
= 0.4A 0.24 0.4
On-Resistance of Internal Switch R
DS
ON
3.3VAUX
T
A
= +85°C, I
D
= 0.4A 0.6
Ω
Foldback Current Limit I
3.3VAUXIN
LIM
V
3.3VAUXO
_ = 0V 0.5 0.75 1.0 A
Current-Foldback Threshold Output current rising (Note 2) 1.2 A
Output Undervoltage Threshold V
3.3VAUXIN
UV
2.76 2.89 2.99 V
Auxiliary Input UVLO Delay Time t
DEG, UVLO
(Note 1) 1.6 ms
3.3VAUXO_ Internal Pulldown R
3.3VAUXO_
ON_ = 0V 1 kΩ
ON AND AUXON COMPARATORS
Threshold Voltage 1.0 2.1 V
Hysteresis V
HYS
25 mV
Input Bias Current I
B, COMP
20 µA
ON_ and AUXON_ Deglitch
Time
t
DEG
Figures 5–8 (Note 3) 4 µs
FAULT RESPONSE, PGOOD_ STATUS OUTPUT COMPARATORS
t
RESP
Figures 5–8 MAX5915/MAX5916 0.5 1.5 ms
PGOOD_ Output Overcurrent
and Undervoltage Response
Time
t
RESP2
Figures 5–8 MAX5915A/MAX5916A 100 ns
Output Overcurrent and
Undervoltage Deglitch Time
t
DELAY
Figures 3–7
16 x
t
RESP
ms
PGOOD_ Startup Timeout t
START
See Figures 1, 2, 5, 6, 7, and 8
4 x
t
DELAY
ms
Autorestart Delay t
RESTART
Delay time to restart after OC and/or
UV shutdown
64 x
t
START
ms
PGOOD_ Output Low Voltage V
OL
I
SINK
= 2mA, ON_ = 0V 0.5 0.7 V
PGOOD_ Output High Leakage
Current
I
LEAK
V
PGOOD_
= +5.5V 1 µA
Thermal Shutdown Threshold T
SD
(Note 4) 125 °C
Thermal Shutdown Hysteresis T
HYS
5 °C
Full Thermal Shutdown
Threshold
T
SD, FULL
(Note 5)
T
SD
+
20
°C
Full Thermal Shutdown
Hysteresis
T
HYS, FULL
5 °C
Note 1: t
DEG, UVLO
is negative edge triggered. There is no time delay when the inputs rise above the UVLO threshold.
Note 2: The current threshold when the output current starts to fold back. See the Typical Operating Characteristics.
Note 3: t
DEG
is negative edge triggered. ON_ or AUXON_ transition from low to high has no delay.
Note 4: Temperature threshold at which the outputs of the channel with overcurrent shut down.
Note 5: The temperature threshold at which both channels shut down.
