Datasheet

MAX5923
+60V Simple Swapper Hot-Swap Switch
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ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 48V, VDIG = 3.3V, AGND_S = AGND = DGND = 0V, R
SENSE
= 0.5Ω ±1%, UVLO = open, EN = VDIG, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
t
POK_LOW
POK from high to low, V
OUT
falling 1 1.4 1.8
POK Output Delay (Note 5)
t
POK_HIGH
POK from low to high, V
OUT
rising 74 88 102
ms
Zero-Current Detection Threshold
Voltage (V
IN
- V
DRS
)
V
ZCTH
2.7 3.75 4.8 mV
ZC Output Low Voltage V
ZC_LOW
I
ZC
= 3mA 0.4 V
ZC Output Leakage Current V
ZC
= 3.3V 0.05 1 µA
Zero-Current Detection Delay t
ZCDEL
ZC from high to low, I
OUT
falling (Note 6) 300 350 400 ms
Zero-Current Deglitch Time t
ZC_DEG
I
OUT
rising 10 ms
Temperature rising 150
Thermal Shutdown
Hysteresis 30
°C
Shutdown Autorestart Time t
RESTART
LATCH = low (Note 7) 1.6 1.92 2.24 s
UNDERVOLTAGE LOCKOUT
UVLO floating, V
IN
rising 26 28 30
Default V
IN
UVLO UVLO
TH
Hysteresis 2.5
V
Referenced to AGND 1.31 1.33 1.36 V
UVLO Comparator Threshold V
REF
Hysteresis 110 mV
UVLO Input Resistance 50 kΩ
LOGIC SIGNALS
EN, LATCH, and ZC_EN Input
High Voltage
V
IH
1.65V < V
DIG
< 5.5V
0.7 ×
V
DIG
V
1.65V < V
DIG
< 2.0V
0.3V ×
V
DIG
EN, LATCH, and ZC_EN Input
Low Voltage
V
IL
2.0V < V
DIG
< 5.5V 0.8
V
EN, LATCH, and ZC_EN Input
Current
-1 +1 µA
EN Low Pulse Width 3µs
FAULT Output Low Voltage V
OL
I
SINK
= 3mA 0.4 V
FAULT Output Leakage Current V
FAULT
= 3.3V 0.05 1 µA
Note 1: This is the time from an output overcurrent or short-circuit condition until the output goes into regulated current limit.
Note 2: OUT voltage above which the output current limit is at its full value.
Note 3: See the Overcurrent Protection section.
Note 4: This is the time the part stays in current-limit mode during overload condition. After t
OC
elapses (or when the junction tem-
perature hits +150°C) the part shuts down.
Note 5: See Typical Operating Characteristics.
Note 6: This is the delay from I
OUT
falling below the zero-current threshold until ZC goes low. A ZC condition shuts down and latches
off the IC.
Note 7: See the Fault Management section.