Electrical Characteristics
Figure 15. Static impedance R
KA
vs. temp.
TL431
Figure 16. Maximum operating current vs. temp.
0.30
Minimum cathode current I
MIN
(mA)
0.6
Static impedance R
KA
(
Ω
)
0.28
V
KA
=V
REF
T
AMB
=+25
°
C
0.4
0.26
0.24
0.2
V
KA
= V
REF
0.22
0.20
-40
-20
0
20
40
60
80
100
0.0
-40
-20
0
20
40
60
80
100
Temperature (
°
C)
Temperature (
°
C)
Figure 17. Gain & phase vs. frequency
Figure 18. Stability behaviour with capacitive
loads
60
Gain
40
I
K
=10 mA
See figure 4
200
150
100
100
V
KA
=V
REF
Cathode current (mA)
80
V
KA
=5 V
60
V
KA
=12 V
Instable
Area
Gain (dB)
20
Phase
50
Phase (
°
)
0
0
-50
-100
-20
-150
-40
1
10
100
Frequency (kHz)
1000
-200
10000
40
20
V
KA
=24 V
0
1E-10
1E-9
1E-8
1E-7
1E-6
1E-5
Capacitive load (Farad)
Figure 19. Maximum power dissipation
Figure 20. Pulse response for IK = 1mA
100
SO8
Batwing
Input and Output voltage (V)
6
T
AMB
= +25
°
C
Cathode current (mA)
Input
80
4
Output
60
TO92
40
Safe
Area
V
KA
=V
REF
T
AMB
=+25
°
C
2
20
0
0
10
20
Cathode voltage (V)
30
0
2
4
Time (
µ
s)
6
8
10
8/13
STMICROELECTRONICS [ STMICROELECTRONICS ]
