TL431 Datasheet, PDF (7/16 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

TL431, A, B Series
Figure 14. Pulse Response
3.0 ^{TA = 25_C}
2.0
Output
1.0
0
5.0
0
Input
Input
Monitor _{220 Output}
Pulse
Generator ⁵⁰
f = 100 kHz
Gnd
0
4.0
8.0
12
16
20
t, TIME (µs)
Figure 15. Stability Boundary Conditions
140
A) VKA = Vref
120 ^{B) VKA = 5.0 V @ IK = 10 mA}
C) VKA = 10 V @ IK = 10 mA
100
D) VKA = 15 V @ IK = 10 mA
D) TA = 25°C
A
B
Stable
A
B
80
Stable
C
60
40
D
20
0
100 pF
1000 pF 0.01 µF 0.1 µF
1.0 µF
CL, LOAD CAPACITANCE
10 µF
Figure 16. Test Circuit For Curve A
of Stability Boundary Conditions
150
IK
V+
CL
Figure 17. Test Circuit For Curves B, C, And D
of Stability Boundary Conditions
150
IK
V+
10 k
CL
TYPICAL APPLICATIONS
Figure 18. Shunt Regulator
Figure 19. High Current Shunt Regulator
V+
Vout
R1
V+
Vout
R1
R2
ǒ Ǔ + ) Vout
1
R1
R2
Vref
R2
ǒ Ǔ + ) Vout
1
R1
R2
Vref
MOTOROLA ANALOG IC DEVICE DATA
7