+48V, Single-Port Network Power Switch
For Power-Over-LAN
_______________________________________________________________________________________   5
V
IN
 SUPPLY CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
62
57
52
47
42
37
0.75
0.80
0.90
0.85
0.95
1.00
0.70
32
T
A
 = +85
?/DIV>
C
T
A
 = +25癈
T
A
 = -40癈
MEASURED AT AGND
V
IN
 SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (癈)
65
50
35
20
5
-10
-25
0.75
0.80
0.90
0.85
0.95
1.00
0.70
-40
80
V
IN
 = 60V
V
IN
 = 48V
V
IN
 = 32V
MEASURED AT
AGND
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
12.0
11.0
DIGITAL SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (癈)
65
50
35
20
5
-10
-25
-40
80
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
32.0
V
IN
 UNDERVOLTAGE LOCKOUT
vs. TEMPERATURE
TEMPERATURE (癈)
65
50
35
20
5
-10
-25
-40
80
V
IN
 RISING
V
IN
 FALLING
0.35
0.40
0.45
0.50
0.55
0.60
0.30
MOSFET R
DSON
vs. TEMPERATURE
TEMPERATURE (癈)
65
50
35
20
5
-10
-25
-40
80
I
OUT
 = 100mA
SENSE TRIP VOLTAGE
vs. TEMPERATURE
TEMPERATURE (癈)
80
65
35   50
-10   5   20
-25
206
207
208
209
210
211
212
213
214
215
205
-40
V
IN
 = 60V
V
IN
 = 48V
V
IN
 = 32V
FOLDBACK-CURRENT LIMIT
(ILIM vs. V
OUT
)
OUTPUT VOLTAGE (V)
45
40
30
35
10
15
20
25
5
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0
0
50
3.52
3.54
3.56
3.58
3.60
3.62
3.64
3.66
3.68
3.70
3.50
ZERO-CURRENT DETECTION THRESHOLD
VOLTAGE vs. TEMPERATURE
TEMPERATURE (癈)
65
50
35
20
5
-10
-25
-40
80
V
IN
 = 60V
V
IN
 = 32V
V
IN
 = 48V
ON-RESISTANCE vs. V
DRAIN
INPUT VOLTAGE (V)
56
52
48
44
40
36
32
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.1
28
60
I
OUT
 = 100mA
T
A
 = +85癈
T
A
 = +25癈
T
A
 = -40癈
Typical Operating Characteristics
(MAX5922A, V
IN
= 48V, V
DIG
, EN, LATCH, CLASS, and ZC_EN = 3.3V, DCA, AGND_S = AGND = DGND = 0V, R
SENSE
= 0.5& ?%,
UVLO floating, R
RCL
= 150k&, R
RDT
= 18.2k&, T
A
= +25癈, unless otherwise noted.)
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