Data Sheet

LM431SA / LM431SB / LM431SC — Programmable Shunt Regulator
Typical Performance Characteristics (Continued)
Figure 16. Stability Boundary Conditions
Figure 17. Anode-Reference Diode Curve
Figure 18. Reference-Cathode Diode Curve Figure 19. Reference Input Voltage vs.
Ambient Temperature
100p 1n 10n 100n 1? 10?
0
20
40
60
80
100
120
140
B
A
A V
KA
= Vref
B V
KA
= 5.0 V @ I
K
= 10
mA
T
A
= 25
o
C
I
K
, CATHODE CURRENT(mA)
C
L
, LOAD CAPACITANCE
I
K
- Cathode Current (mA)
C
L
- Load Capacitance
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0
1
2
3
4
5
Curr
ent(mA)
Anode-Ref. Voltage(V)
Current (mA)
Anode-Ref. Voltage (V)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0
1
2
3
4
5
Curr
ent(mA)
Ref.-Cathode Voltage(V)
Ref.-Cathode Voltage (V)
Current (mA)
-50 -25 0 25 50 75 100 125
2.46
2.47
2.48
2.49
2.50
2.51
V
REF
, Reference Input Voltage (V)
T
A
, Ambient Temperature (
o
C)
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