APL1431
Typical Characteristics (Cont.)
Small-Signal Voltage Amplification vs.
Frequency
60
50
40
30
20
10
01
10
100
1000
Frequency (kHz)
Stability Boundary Conditions
100
90
80
70
VKA=VREF
60
50
Stable
40
Stable
30
VKA=3.3V
20
Unstable
10
0
0.01
0.1
1
10
Load Capacitance (µF)
Copyright © ANPEC Electronics Corp.
7
Rev. A.4 - Mar., 2008
232 Ω
VIN
VO
10uF
15k Ω
8.25k Ω
Voltage Amplification
Test Circuit
150 Ω
VIN
VO
IK
CL
Stability Test Circuit for VKA=VREF
150 Ω
VIN
R1 10k Ω
VO
IK
CL
R2
Stability Test Circuit for VKA>VREF,
VO= VKA= VREF x (1+R1/R2) + IREF x R1
Use the MLCC for CL
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