Datasheet

50
40
10
0
0.001 0.01 0.1 1
70
90
STABILITY BOUNDARY CONDITIONS
FOR ALL TL431B, TL432, SOT-23, SC-70, AND Q-TEMP DEVICES
100
10
30
80
60
20
Stable
A V
KA
= V
ref
B V
KA
= 5 V
C V
KA
= 10 V
D V
KA
= 15 V
f
C
L
− Load Capacitance − µF
A
C
D
150 Ω
I
KA
R1 = 10 kΩ
R2
C
L
V
BATT
I
KA
C
L
V
BATT
150 Ω
TEST CIRCUIT FOR CURVE A
TEST CIRCUIT FOR CURVES B, C, AND D
− Cathode Current − mA
I
KA
+
−
+
−
B
A
T
A
= 25°C
Stable
B
TL431, TL431A, TL431B, TL432, TL432A, TL432B
SLVS543N –AUGUST 2004–REVISED JANUARY 2014 www.ti.com
Typical Characteristics (continued)
A. The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2
and V+ are adjusted to establish the initial V
KA
and I
KA
conditions, with C
L
= 0. V
BATT
and C
L
then are adjusted to
determine the ranges of stability.
Figure 16.
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