Low-Voltage, Dual Hot-Swap Controllers with
Independent On/Off Control
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN_
= +1V to +13.2V provided at least one supply is higher than +2.7V, V
ON1
= V
ON2
= +2.7V, T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at V
IN1
= +5V, V
IN2
= +3.3V, and T
A
= +25癈.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
ON_
< 4.5V
0.03
V
ON_
> 4.5V
100
ON_ Input Bias Current
I
BON
V
IN1
= V
IN2
= +13.2V
V
ON_
= 4.5V
0.03
1
礎
ON_ Pulse-Width Low
t
UNLATCH
To unlatch after a latched fault
100
祍
DIGITAL OUTPUT (PGOOD_)
Output Leakage Current
V
PGOOD
_ = 13.2V
1
礎
Output Voltage Low
V
OL
I
SINK
= 1mA
0.4
V
PGOOD_ Delay
t
PGDLY
After t
START
, MON_ = V
IN_
0.75
ms
OUTPUT VOLTAGE MONITORS (MON1, MON2)
Overvoltage
657
687
707
MON_ Trip Threshold
V
MON
Undervoltage
513
543
563
mV
MON_ Glitch Filter
20
祍
MON_ Input Bias Current
V
MON_
= 600mV
0.03
礎
UNDERVOLTAGE LOCKOUT (UVLO)
Startup is initiated when this threshold is
reached by V
IN1
or V
IN2
, V
ON
_ > 0.875V
2.10
2.4
2.67
V
UVLO Threshold
V
UVLO
Hysteresis
100
mV
UVLO Glitch Filter Reset Time
V
IN_
toggled below UVLO to unlatch after a
fault
100
祍
UVLO to Startup Delay
t
D UVLO
V
IN_
step from 0 to 2.8V
20
37.5
66
ms
SHUTDOWN LATCH/RESTART
Autoretry Delay
t
RETRY
Delay time to restart after fault shutdown
64 x t
START
ms
Note 1: All devices are 100% tested at T
A
= +25癈 and T
A
= +85癈. Limits at T
A
= 0癈 and -40癈 are guaranteed by design.
Note 2: The MAX5955/MAX5956 slow-comparator threshold is adjustable. V
SC,TH
= R
LIM
0.25?/SPAN>A + 25mV (see the Typical
Operating Characteristics).
Note 3: The current-limit slow-comparator response time is weighted against the amount of overcurrent; the higher the overcurrent
condition, the faster the response time (see the Typical Operating Characteristics).
Note 4: The startup period (t
START
) is the time during which the slow comparator is ignored and the device acts as a current-limiter
by regulating the sense current with the fast comparator (see the Startup Period section).
Note 5: The current available at GATE is a function of V
GATE
(see the Typical Operating Characteristics).
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