AIC431/TL431A/TL431
n
TYPICAL
PERFORMANCE CHARACTERISTICS
(Continued)
Pulse Response
Input
Pulse
Generator
f=100kHz
RB
220
OUTPUT
Output
RA
50
AIC431
Test Circuit For Pulse Respnose
Stability Boundary Conditions
100
Cathode Current (mA)
V
Z
80
V
Z
=V
REF
60
Stable
C
L
AIC431
R
150
40
Stable
20
VIN
Load Capacitance (
µ
F)
The areas between the curves represent condition that
may cause the device oscillate
Dynamic impedance vs. Frequency
10
0
1E-4
1E-3
0.01
0.1
1
10
Test Circuit for Stability Boundary Conditions
Dynamic Impedance (
Ω
)
Iz=10mA
TA=25
°
C
R1
Output
50
1
AIC431
+
AC
R2
50
+
3V
0.1
GND
1K
10K
100K
1M
Frequency (Hz)
7