TL431, TL431A, TL431B
TL432, TL432A, TL432B
SLVS543M –AUGUST 2004–REVISED JULY 2012
www.ti.com
APPLICATION INFORMATION
Table 2. Table of Application Circuits
APPLICATION
FIGURE
Shunt regulator
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
Single-supply comparator with temperature-compensated threshold
Precision high-current series regulator
Output control of a three-terminal fixed regulator
High-current shunt regulator
Crowbar Circuit
Precision 5-V, 1.5-A regulator
Efficient 5-V precision regulator
PWM converter with reference
Voltage monitor
Delay timer
Precision current limiter
Precision constant-current sink
R
(see Note A)
V
V
O
I(BATT)
R1
R1
R2
æ
ö
V
=
1 +
V
ref
O
ç
÷
0.1%
è
ø
V
ref
TL431
R2
0.1%
RETURN
A. R should provide cathode current ≥1 mA to the TL431 at minimum V(BATT)
.
Figure 20. Shunt Regulator
V
I(BATT)
V
O
TL431
V
≈2 V
on
Input
V
off
≈V
I(BATT)
V
IT
≈ 2.5 V
GND
Figure 21. Single-Supply Comparator With Temperature-Compensated Threshold
28
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