Datasheet

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APPLICATION INFORMATION
V
(BATT)
V
O
Input
V
on
≈ 2 V
V
off
≈ V
(BATT)
TL1431
V
IT
= 2.5 V
GND
NOTE A: R should provide cathode current ≥1 mA to the TL1431 at
minimum V
(BATT)
.
V
(BATT)
R
R1
0.1%
R2
0.1%
V
I(ref)
V
O
TL1431
V
O
+
ǒ
1 )
R1
R2
Ǔ
V
I(ref)
TL1431-EP
PRECISION PROGRAMMABLE REFERENCE
SLVS529C – APRIL 2004 – REVISED DECEMBER 2006
TABLE OF APPLICATION CIRCUITS
APPLICATION FIGURE
Shunt regulator 16
Single-supply comparator with temperature-compensated threshold 17
Precision high-current series regulator 18
Output control of a three-terminal fixed regulator 19
Higher-current shunt regulator 20
Crowbar 21
Precision 5-V, 1.5-A, 0.5% regulator 22
5-V precision regulator 23
PWM converter with 0.5% reference 24
Voltage monitor 25
Delay timer 26
Precision current limiter 27
Precision constant-current sink 28
Figure 16. Shunt Regulator Figure 17. Single-Supply Comparator
With Temperature-Compensated Threshold
12
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