TL1431-Q1 Datasheet, PDF (11/19 Pages) Texas Instruments – PRECISION PROGRAMMABLE REFERENCE

TL1431ĆQ1
PRECISION PROGRAMMABLE REFERENCE
APPLICATION INFORMATION
SLVS534B − JUNE 2004 − REVISED APRIL 2008
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
FIGURE
16
17
18
19
20
21
22
23
24
25
26
27
28
V(BATT)
R
R1
0.1%
VI(ref)
R2
0.1%
VO
TL1431
ǒ Ǔ VO +
1
)
R1
R2
VI(ref)
NOTE A: R should provide cathode current ≥1 mA to the TL1431 at
minimum V(BATT).
Figure 16. Shunt Regulator
V(BATT)
Input
VIT = 2.5 V
VO
Von ≈2 V
Voff ≈V(BATT)
TL1431
GND
Figure 17. Single-Supply Comparator
With Temperature-Compensated Threshold
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