Datasheet

MAX5922
+48V, Single-Port Network Power Switch
For Power-Over-LAN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages with respect to AGND_S, unless otherwise noted.)
IN ............................................................................-0.3V to +76V
UVLO ........................................................................-0.3V to +6V
V
DIG
to DGND ..........................................................-0.3V to +6V
OUT .......................................................-0.3V to (V
DRAIN
+ 0.3V)
DRAIN..........................................................-0.3V to (V
IN
+ 0.3V)
RDT.........................................................................-0.3V to +12V
RCL to IN ................................................................-10V to +0.3V
EN, DET_DIS, DCA, CLASS, ZC_EN,
and LATCH to DGND ...........................................-0.3V to +6V
POK, ZC, CL0, CL1, CL2, and FAULT to DGND......-0.3V to +6V
DGND ..........................................................................-5V to +5V
Maximum Current into Drain .................................................0.8A
Maximum Current into POK, ZC, CL0, CL1, CL2, FAULT...20mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TSSOP (Derate 12.8mW/°C above +70°C).....1026mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 48V, V
DIG
= 3.3V, AGND_S = AGND = DGND = 0V, R
SENSE
= 0.5Ω ±1%, UVLO = open, EN = V
DIG
, R
RCL
= 150Ω ±1%, R
RDT
= 18.2kΩ ±1%, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Analog Input Voltage Range V
IN
32 60 V
Analog Input Supply Current I
IN
V
IN
= 60V, measured at AGND after OUT
has stopped slewing
11.6mA
Digital Input Voltage Range V
DIG
1.65 5.50 V
Digital Input Supply Current I
DIG
V
DIG
= 5V 0.05 0.1 mA
DGND to AGND Operating
Voltage Range
-4 +4 V
Current-Limit Response Time OUT shorted to AGND (Note 2) 1 µs
OUT Current-Limit Foldback
Voltage
V
FBSTOP
(Note 3) 18 V
Maximum voltage across R
SENSE
at V
OUT
>
V
FBSTOP
198 212 223
Current-Limit Sense Voltage
(V
IN
- V
DRS
) (Note 4)
V
ILIM
0°C to +70°C 203 212 221
mV
Current-Limit Sense Foldback
Voltage (V
IN
- V
DRS
)
V
ILIM_fb
V
OUT
= 0V 64 70 76 mV
Overcurrent Timeout t
OC
OUT shorted to AGND (Note 5) 50 60 75 ms
T
A
= +25°C0.45
D
MOS
On-Resistance R
DSON
I
OUT
= 100mA
T
A
= +85°C0.75
Ω
Power-Off OUT Sink Current EN = DGND, V
OUT
= 48V 15 µA
Maximum Output Voltage Slew
Rate
dV
OUT
/dt V
OUT
rising, no load 100 V/ms
Maximum Output Current Slew
Rate
dI
OUT
/dt V
OUT
rising, C
LOAD
= 100µF 35 A/ms
V
OUT
rising, POK from low to high 650 750 850 mV
Power-OK Threshold (V
IN
- V
OUT
)V
THPOK
Hysteresis 10 %
POK Output Low Voltage V
POK_LOW
I
POK
= 3mA 0.4 V
POK Output Leakage Current V
POK
= 3.3V 0.05 1 µA