TL431
Figure 9.
Reference voltage vs. temp.
Electrical Characteristics
Figure 10. Reference voltage vs. cathode current
100
2.54
Cathode voltage V
KA
(V)
Cathode current I
KA
(mA)
2.52
V
KA
= V
REF
I
K
= 10 mA
75
50
25
0
-25
-50
T
AMB
=+25
°
C
2.50
2.48
2.46
2.44
-40
-20
0
20
40
60
80
100
-1
0
1
2
3
Temperature (
°
C)
Cathode voltage V
KA
(V)
Figure 11. Reference voltage vs. cathode current Figure 12. Reference current vs. temp.
2
Reference current I
REF
(
µ
A)
2.0
I
K
=10 mA
R
1
=10k
Ω
R2= +
∝
Cathode current I
KA
(mA)
1
T
AMB
= +25
°
C
1.5
0
1.0
-1
0.5
-2
-1
0
1
Cathode voltage V
KA
(V)
2
3
0.0
−
40
−
20
0
20
40
60
80
100
Temperature °C
Figure 13. Off-state cathode current vs. temp.
Figure 14. Ratio of change in V
REF
to change in
V
KA
vs. temp.
2.0
0.0
Off-state current I
OFF
(
µ
A)
1.5
∆
V
REF
/
∆
V
KA
(mV / V)
V
KA
= 36 V
V
REF
= 0 V
-0.5
I
K
= 10 mA
1.0
-1.0
0.5
-1.5
0.0
-40
-20
0
20
40
60
80
100
-2.0
-40
-20
0
20
40
60
80
100
Temperature (
°
C)
Temperature (
°
C)
7/13
STMICROELECTRONICS [ STMICROELECTRONICS ]
