Datasheet
TL431 Electrical Characteristics
7/13
Figure 9. Reference voltage vs. temp. Figure 10. Reference voltage vs. cathode current
Figure 11. Reference voltage vs. cathode current Figure 12. Reference current vs. temp.
Figure 13. Off-state cathode current vs. temp. Figure 14. Ratio of change in V
REF
to change in
V
KA
vs. temp.
-40 -20 0 20 40 60 80 100
2.44
2.46
2.48
2.50
2.52
2.54
V
KA
= V
REF
I
K
= 10 mA
Cathode voltage V
KA
(V)
Temperature (°C)
-10123
-50
-25
0
25
50
75
100
T
AMB
=+25
°
C
Cathode current I
KA
(mA)
Cathode voltage V
KA
(V)
-10123
-2
-1
0
1
2
T
AMB
= +25°C
Cathode current I
KA
(mA)
Cathode voltage V
KA
(V)
−40 −20 0 20 40 60 80 100
0.0
0.5
1.0
1.5
2.0
I
K
=10 mA
R
1
=10k
Ω
R2= +
∝
Reference current I
REF
(
µ
A)
Temperature °C
-40 -20 0 20 40 60 80 100
0.0
0.5
1.0
1.5
2.0
V
KA
= 36 V
V
REF
= 0 V
Off-state current I
OFF
(
µ
A)
Temperature (
°
C)
-40 -20 0 20 40 60 80 100
-2.0
-1.5
-1.0
-0.5
0.0
I
K
= 10 mA
∆V
REF
/ ∆V
KA
(mV / V)
Temperature (°C)