Electrical characteristics
TL431, TL432
Figure 7.
Test circuit for VKA = Vref
Figure 8.
Test circuit for programming mode
Input
Output
R
Input
R
IK
Output
R1
IK=10mA
IREF
VKA
VKA
R2
VREF
VREF
R1
(1 + ------) + R1 x I
V
= V
KA
REF
REF
R2
Figure 9.
Test circuit for Ioff
Figure 10. Test circuit for phase margin and
voltage gain
VKA=36V
10μF
IK=10mA
IOFF
10μF
Input
VREF
Figure 11. Test circuit for response time
Figure 12. Reference voltage vs. temperature
2.54
VKA = VREF
IK = 10 mA
IK=1mA
2.52
2.50
2.48
2.46
2.44
1 mA
0 mA
-40
-20
0
20
40
60
80
100 120
Temperature (°C)
8/21
Doc ID 4467 Rev 11
STMICROELECTRONICS [ ST ]
