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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004
TYPICAL CHARACTERISTICS
TYPICAL REGIONS OF STABILITY
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)
vs
(1)
(1)
COMPENSATION SERIES RESISTANCE (CSR)
vs
OUTPUT CURRENT
ADDED CERAMIC CAPACITANCE
100
100
Region of Instability
Region of Instability
10
1
10
1
C
T
= 4.7 µF
I = 150 mA
C = 4.7 µF
O
J
O
J
= 25°C
T
= 25°C
0.1
0.1
Region of Instability
Region of Instability
0.01
0.01
0
50
100
150
200
250
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
I
O
− Output Current − mA
Added Ceramic Capacitance − µF
Figure 16
Figure 17
TYPICAL REGIONS OF STABILITY
TYPICAL REGIONS OF STABILITY
(1)
(1)
COMPENSATION SERIES RESISTANCE (CSR)
COMPENSATION SERIES RESISTANCE (CSR)
vs
vs
OUTPUT CURRENT
ADDED CERAMIC CAPACITANCE
100
100
Region of Instability
Region of Instability
10
1
10
1
C
= 10 µF
O
C
= 10 µF
O
0.1
0.1
Region of Instability
Region of Instability
0.01
0.01
0
50
100
150
200
250
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
I
O
− Output Current − mA
Added Ceramic Capacitance − µF
Figure 19
Figure 18
(1)
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace
resistance to C
.
O
11
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