Datasheet

KA431S / KA431SA / KA431SL — Programmable Shunt Regulator
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA431S / KA431SA / KA431SL Rev. 1.1.1 6
Typical Performance Characteristics
Figure 6. Cathode Current vs. Cathode Voltage
Figure 7. Cathode Current vs. Cathode Voltage
Figure 8. Reference Input Voltage vs. Ambient
Temperature
Figure 9. Reference Input Voltage vs. Ambient
Temperature
Figure 10. Frequency vs. Small Signal Voltage
Amplification
Figure 11. Pulse Response
-2 -1 0 1 2 3
-100
-50
0
50
100
150
V
KA
= V
REF
T
A
= 25
o
C
I
K
, Cathode Current (mA)
V
KA
, Cathode Voltage (V)
-10123
-200
0
200
400
600
800
I
KA(MIN)
V
KA
= V
REF
T
A
= 25
o
C
I
KA
, CATHODE CURRENT (uA)
V
KA
, CATHODE VOLTAGE (V)
-50 -25 0 25 50 75 100 125
0.000
0.025
0.050
0.075
0.100
I
off
, Off-State Cathode Current (uA)
T
A
, Ambient Temperature (
o
C)
-50 -25 0 25 50 75 100 125
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
I
ref
, Reference Input Current (uA)
T
A
, Ambient Temperature (
o
C)
1k 10k 100k 1M 10M
-10
0
10
20
30
40
50
60
T
A
= 25
o
C
I
KA
= 10mA
Open Loop Voltage Gain (dB)
Frequency (Hz)
0 4 8 12 16 20
0
1
2
3
4
5
6
T
A
=25
o
C
OUTPUT
INPUT
Voltage Swing (V)
Time (us)