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TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW POWER 150 mA LOW DROPOUT LINEAR REGULATORS
SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004
TYPICAL CHARACTERISTICS
TYPICAL REGIONS OF STABILITY
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)
(1)
vs
OUTPUT CURRENT
100
CSR − Compensation Series Resistance −
Ω
CSR − Compensation Series Resistance −
Ω
Region of Instability
10
COMPENSATION SERIES RESISTANCE (CSR)
(1)
vs
ADDED CERAMIC CAPACITANCE
100
Region of Instability
10
1
CO = 4.7
µF
TJ = 25°C
1
I = 150 mA
CO = 4.7
µF
TJ = 25°C
0.1
Region of Instability
0.1
Region of Instability
0.01
0
50
100
150
200
250
IO − Output Current − mA
0.01
0
0.1
0.2 0.3 0.4 0.5
0.6 0.7 0.8
0.9
1
Added Ceramic Capacitance −
µF
Figure 16
TYPICAL REGIONS OF STABILITY
Figure 17
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)
(1)
vs
OUTPUT CURRENT
100
CSR − Compensation Series Resistance −
Ω
Region of Instability
10
CSR − Compensation Series Resistance −
Ω
COMPENSATION SERIES RESISTANCE (CSR)
(1)
vs
ADDED CERAMIC CAPACITANCE
100
Region of Instability
10
1
CO = 10
µF
1
CO = 10
µF
0.1
Region of Instability
0.1
Region of Instability
0.01
0
0.1
0.2 0.3 0.4 0.5
0.6 0.7 0.8
0.9
1
Added Ceramic Capacitance −
µF
0.01
0
50
100
150
200
250
IO − Output Current − mA
Figure 18
Figure 19
(1) CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace
resistance to CO.
11
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