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SLVS351I – SEPTEMBER 2002 – REVISED MAY 2006
TYPICAL CHARACTERISTICS (continued)
TPS79630
DROPOUT VOLTAGE
vs
OUTPUT CURRENT
350
V
OUT
= 2.5 V
R
L
= 10
Ω
C
NR
= 0.01
µF
TPS79625
POWER UP/POWER DOWN
4.0
3.5
3.0
500 mV/Div
2.5
2.0
1.5
V
IN
TPS79601
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
300
250
300
T
J
= 125°C
250
T
J
= 125°C
200
V
DO
(mV)
T
J
= 25°C
150
T
J
= −40°C
100
V
DO
(mV)
200
150
100
T
J
= 25°C
1.0
0.5
0
0
1
2
3
4
5
6
7
8
9
10
200 µs/Div
V
OUT
T
J
= −40°C
50
0
0 100 200 300 400 500 600 700 800 9001000
I
OUT
(mA)
2.5
3.0
3.5
4.0
4.5
5.0
V
IN
(V)
I
OUT
= 1 A
C
OUT
= 10
µF
C
NR
= 0.01
µF
50
0
Figure 16.
TPS79630
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
(ESR)
vs
OUTPUT CURRENT
100
ESR − Equivalent Series Resistance −
Ω
ESR − Equivalent Series Resistance −
Ω
C
OUT
= 1
µF
Region of
Instability
Figure 17.
TPS79630
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
(ESR)
vs
OUTPUT CURRENT
ESR − Equivalent Series Resistance − Ω
Figure 18.
TPS79630
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
(ESR)
vs
OUTPUT CURRENT
100
C
OUT
= 10.0
µF
Region of
Instability
100
C
OUT
= 2.2
µF
Region of
Instability
10
10
10
1
Region of Stability
0.1
1
Region of Stability
0.1
1
Region of Stability
0.1
0.01
0.01
1
10
30
60
125 250 500 750 1000
I
OUT
(mA)
0.01
1
10
30
60
125 250 500 750 1000
I
OUT
(mA)
1
10
30
60
125 250 500 750 1000
I
OUT
(mA)
Figure 19.
Figure 20.
Figure 21.
7
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