SNVS178G – JANUARY 2002 – REVISED FEBRUARY 2013
Typical Performance Characteristics
Unless otherwise specified, T
J
= 25°C
Quiescent Current
vs
Input Voltage
(FB = 1.5V)
400
QUIESCENT CURRENT (PA)
350
300
250
T
j
= 25qC
200
150
100
4
T
j
= 125qC
T
j
= -40qC
FB VOLTAGE (V)
1.255
1.250
1.245
1.240
V
IN
=35V
V
IN
=12V
V
IN
=4.5V
1.235
1.230
1.225
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°
C)
Feedback Voltage
vs
Temperature
12
20
28
36
INPUT VOLTAGE (V)
Hysteresis Voltage
vs
Input Voltage
110
HYSTERESIS VOLTAGE (mV)
HYSTERESIS VOLTAGE (%)
14
Hysteresis Voltage
vs
Temperature
12
105
T
J
= 25qC
100
10
8
95
6
90
4
12
20
28
36
INPUT VOLTAGE (V)
4
-40 -20
0
20
40
60
80 100 120 140
JUNCTION TEMPERATURE (°
C)
Current Limit ADJ Current
vs
Temperature
6.5
12
Current Limit One Shot OFF Time
vs
Temperature
ONE SHOT OFF TIME (Ps)
ADJ CURRENT (PA)
6.0
V
IN
=12V
5.5
V
IN
=35V
V
IN
=4.5V
5.0
11
10
V
IN
= 4.5V
9
V
IN
= 12V
8
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°
C)
4.5
-40 -20
0
20
40
60 80 100 120 140
JUNCTION TEMPERATURE (qC)
4
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