TL431 Datasheet, PDF (8/16 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

TL431, A, B Series
Figure 20. Output Control for a
Three–Terminal Fixed Regulator
MC7805
V+
In
Out
Common
Vout
R1
Figure 21. Series Pass Regulator
V+
Vout
R1
R2
ǒ Ǔ + ) Vout
1
R1
R2
Vref
+ ) Vout min Vref 5.0V
R2
ǒ Ǔ + ) Vout
1
R1
R2
Vref
+ ) Vout min Vref Vbe
Figure 22. Constant Current Source
V+
RCL
Iout
+ Iout
Vref
RCL
Figure 23. Constant Current Sink
V+
Isink
+ ISink
Vref
RS
RS
Figure 24. TRIAC Crowbar
V+
Vout
R1
R2
ǒ Ǔ + ) Vout(trip)
1
R1
R2
Vref
Figure 25. SRC Crowbar
V+
Vout
R1
R2
ǒ Ǔ + ) Vout(trip)
1
R1
R2
Vref
8
MOTOROLA ANALOG IC DEVICE DATA