Datasheet

 
 
SLVS399A − JANUARY 2002 − REVISED MAY 2006
15
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PARAMETER MEASUREMENT INFORMATION
Figure 15
0.1
1
10
100
V
I
= 2.7∼5 V,
V
O
= 0.9 V,
C
O
= 4.7 µF
Max ESR
Min ESR
0 50 100 150
LDO Typical Regions of Stability
LDO TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
vs
LOAD CURRENT
200 250
I
L
− Load Current − mA
ΩEquivalent Series Resistance −
Figure 16
0.1
1
10
100
V
I
= 2.7∼5 V,
V
O
= 0.9 V,
C
O
= 10 µF
Max ESR
Min ESR
0 50 100 150 200 250
I
L
− Load Current − mA
LDO TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
vs
LOAD CURRENT
LDO Typical Regions of Stability
ΩEquivalent Series Resistance −
Figure 17
0.01
0.1
1
10
100
V
I
= 2.7∼5 V,
V
O
= 0.9 V,
C
O
= 100 µF
Max ESR
Min ESR
0 50 100 150
Equivalent Series Resistance −
LDO TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE
vs
LOAD CURRENT
200 250
I
L
− Load Current − mA
Ω
LDO Typical Regions of Stability
Figure 18
0
20
40
60
80
100
120
140
−50 0 50 100 150
Switch on,
LDO on
Switch off
LDO on
Switch on,
LDO off
− Supply Current −
SUPPLY CURRENT
vs
JUNCTION TEMPERATURE
T
J
− Junction Temperature − °C
I
CC
Aµ
Switch off,
LDO off