AP432/AP432A
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY
60
IKA=10mA
Output
232Ω
TA=25oC
IKA
50
15KΩ
40
30
20
10
0
9µF
-
+
-
8.25KΩ
GND
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
10K
1K
100K
1M
10M
f-Frequency-Hz
REFERENCE IMPEDANCE vs. FREQUENCY
100
10
1
IKA=10mA
TA=25oC
1KΩ
Output
I
KA
50Ω
-
+
GND
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1
1K
10K
100K
1M
10M
f-Frequency-Hz
STABILITY BOUNDARY CONDITIONS†
A VKA=Vref
150O
100
90
80
70
60
50
40
30
20
10
0
TA=25oC
I
KA
B VKA=5V
+
C VKA=10V
D VKA=15V
VBATT
CL
-
B
Stable
C
Stable
TEST CIRCUIT FOR CURVE A
A
D
I
KA
150O
VBATT
R1=10KO
CL
+
-
R2
0.001
0.01
0.1
1
10
CL-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 VKA and IKA conditions with CL=0.VBATT and
TEST CIRCUIT FOR CURVE B, C, AND D
C
L were then adjusted to determine the ranges of stability.
Anachip Corp.
www.anachip.com.tw
Rev.1.0 May.7, 2004
6/16
ANACHIP [ ANACHIP CORP ]
