Datasheet

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
50
40
10
0
0.001 0.01 0.1 1
70
90
STABILITY BOUNDARY CONDITIONS
FOR ALL TL431 AND TL431A DEVICES
(EXCEPT FOR SOT23-3, SC-70, AND Q-TEMP DEVICES)
100
10
30
80
60
20
T
A
= 25°C
B
Stable
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
− Cathode Current − mA
I
KA
+
−
+
−
3
2
1
0
−1 0 1 2 3 4
Input and Output V oltage − V
4
5
PULSE RESPONSE
6
5 6 7
Input
Output
T
A
= 25°C
220 Ω
50 Ω
GND
Output
Pulse
Generator
f = 100 kHz
TEST CIRCUIT FOR PULSE RESPONSE
t − Time − µs
TL431, TL431A, TL431B, TL432, TL432A, TL432B
www.ti.com SLVS543N –AUGUST 2004–REVISED JANUARY 2014
Typical Characteristics (continued)
Figure 14.
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 15.
Copyright © 2004–2014, Texas Instruments Incorporated Submit Documentation Feedback 19
Product Folder Links :TL431 TL431A TL431B TL432 TL432A TL432B