TL431 Datasheet, PDF (10/12 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

PRODUCT DATABOOK 1996/1997
TL431/TL431A/TL431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
TYPICAL CHARACTERISTICS
FIGURE 14. — PULSE RESPONSE
6
5
4
3
2
1
0
3
2
1
0
0
1
2
3
45
6
(t) Time - (µs)
220W
Pulse
Generator
50W
f = 100kHz
Test Circuit for Pulse Response
Output
GND
FIGURE 15. — STABILITY BOUNDARY CONDITIONS
100
90
A V_KA = V_REF
B V_KA = 5V
80
C V_KA = 10V
D V_KA = 15V
70
Stable
60
A*
50
B*
C*
I_K = 10mA
T_A = 25°C
Stable
40
30
D*
20
10
0
0.001
0.01
0.1
1
10
(C_L) Load Capacitance - (µF)
* The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to
establish the initial V_KA and I_K conditions with C_L = 0. V_BATT and C_L were
then adjusted to determine the ranges of stability.
R1=10kW
I_K
C_L
R2
150W
V_BATT
Test Circuit for Curve A
150W
I_K
C_L
V_BATT
Test Circuit for Curves B, C, and D
10
Copyright © 1999
Rev. 1.3 9/99