TL1431_12 Datasheet, PDF (9/27 Pages) Texas Instruments – PRECISION PROGRAMMABLE REFERENCE

TL1431
www.ti.com
SLVS062M – DECEMBER 1991 – REVISED APRIL 2012
APPLICATION INFORMATION
Table 2. Table of Application Circuits
APPLICATION
Shunt regulator
Single-supply comparator with temperature-compensated threshold
Precision high-current series regulator
Output control of a three-terminal fixed regulator
Higher-current shunt regulator
Crowbar
Precision 5-V, 1.5-A, 0.5% regulator
5-V precision regulator
PWM converter with 0.5% reference
Voltage monitor
Delay timer
Precision current limiter
Precision constant-current sink
A. R should provide cathode current ≥1 mA to the TL1431 at minimum V_(BATT).
R
V_(BATT)
V_O
R1
0.1%
V_I(ref)
TL1431
R2
0.1%
Input
V_(BATT)
FIGURE
16
17
18
19
20
21
22
23
24
25
26
27
28
V_O
V_on ≈ 2 V
V_off ≈ V_(BATT)
TL1431
ǒ Ǔ VO +
1
)
R1
R2
VI(ref)
V_IT = 2.5 V
GND
Figure 19. Shunt Regulator
Figure 20. Single-Supply Comparator With
Temperature-Compensated Threshold
A. R should provide cathode current ≥1 mA to the TL1431 at minimum V_(BATT).
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