TL431C Datasheet, PDF (8/16 Pages) NXP Semiconductors – Adjustable precision shunt regulators

Philips Semiconductors
Adjustable precision shunt regulators
Product specification
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
TYPICAL CHARACTERISTICS
7
6
5
4
3
2
1
0
0
1
2
3
4
5
t – TIME – µs
Pulse Response
6
7
PULSE
GENERATOR
f = 100kHz
220Ω
50Ω
OUTPUT
GND
Test Circuit
Figure 14. Pulse Response
SL01182
100
T_amb = 25°C
90
A V_KA = V_ref
B V_KA = 5V
C V_KA = 10V
80
D V_KA = 15V
70
60
50
40
30
20
10
0
0.001
UNSTABLE
B
V_KA < 5
STABLE
A
UNSTABLE
V_KA < 10
STABLE
A
150Ω
I_K
C_L
V_BATT
Test Circuit for Curve A
C
UNSTABLE V_KA < 15V
D
UNSTABLE V_KA
0.01
0.1
1
C_L – LOAD CAPACITANCE – (µF)
R1 = 10kΩ
I_K
C_L
R2
150Ω
V_BATT
10
Test Circuit for Curves B, C, and D
Figure 15. Stability Boundary Conditions
SL01176
1997 Feb 25
8