Philips Semiconductors
Product specification
Adjustable precision shunt regulators
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
TYPICAL APPLICATIONS
V+
R1
V
OUT
V+
R1
V
OUT
R2
R2
V
OUT
+
1
)
R1 V
ref
R2
SL01183
V
OUT
+
1
)
R1 V
ref
R2
V
OUT
Min = V
ref
+ V
be
Figure 21. Series Pass Regulator
SL01186
Figure 18. Shunt Regulator
V+
R
CL
V+
I
OUT
V
OUT
V
IN
V
IN
< V
ref
> V
ref
V
TH
= V
ref
V
OUT
V+
≈2.0V
SL01184
I
OUT
+
V
ref
R
CL
SL01187
Figure 19. Single-Supply Comparator with
Temperature-Compensated Threshold
Figure 22. Constant Current Source
V+
R1
V
OUT
V+
I
SINK
I
SINK
+
R2
R
S
V
ref
R
S
V
OUT
+
1
)
R1 V
ref
R2
SL01185
SL01189
Figure 20. High Current Shunt Regulator
Figure 23. Constant Current Sink
1997 Feb 25
10
PHILIPS [ NXP SEMICONDUCTORS ]
