SLUS772 – MARCH 2008
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TYPICAL CHARACTERISTICS (continued)
REFERENCE VOLTAGE CHANGE
vs
JUNCTION TEMPERATURE
REFERENCE VOLTAGE CHANGE
vs
INPUT VOLTAGE
0.4
52 V
0.2
V
FB
– Reference Voltage Change – %
V
FB
– Reference Voltage Change – %
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
0
10
20
30
40
V
VDD
– Input Voltage – V
Figure 6.
OVERCURRENT THRESHOLD
vs
JUNCTION TEMPERATURE
0.0
-0.2
-0.4
4.5 V
V
VDD
12 V
4.5 V
52 V
-0.6
12 V
-0.8
-40 -25 -10 5 20 35 50 65 80 95 110 125
T
J
– Juncton Temperature – ° C
Figure 5.
UNDERVOLTAGE LOCKOUT THRESHOLD
vs
JUNCTION TEMPERATURE
50
60
4.30
V
UVLO
– Undervoltage Lockout Threshold – V
155
UVLO
V
ISNS(OC)
– Overcurrent Threshold – mV
V
VDD
154
153
152
30 V
151
150
149
148
4.5 V
7.5 V
12 V & 20 V
30 V
4.5 V
4.25
Off
On
4.20
UVLO On
7.5 V
4.15
4.10
12 V & 20 V
4.05
UVLO Off
4.00
-40 -25 -10 5 20 35 50 65 80 95 110 125
T
J
– Juncton Temperature – ° C
Figure 7.
147
-40 -25 -10 5 20 35 50 65 80 95 110 125
T
J
– Juncton Temperature – ° C
Figure 8.
6
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