Datasheet

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS
SLVS203E – JUNE 1999 – REVISED MAY 2001
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 17
1
0 25 50 75 100
100
I
O
– Output Current – mA
ESR – Equivalent Series Resistance – Ω
10
Region of Instability
V
IN
= 4.3 V
C
O
= 4.7 µF
3.3 V LDO
TPS76933
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE (ESR)
†
vs
OUTPUT CURRENT
0.1
Region of Stability
0.2
Figure 18
0 0.1 0.2 0.3 0.4 0.5
Added Ceramic Capacitance – µF
0.6 0.7 0.8 0.9 1
1
100
ESR – Equivalent Series Resistance – Ω
10
Region of Instability
Region of Stability
V
IN
= 4.3 V
C
O
= 4.7 µF
I
L
= 100 mA
TPS76933
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE (ESR)
vs
ADDED CERAMIC CAPACITANCE
Figure 19
I
O
– Output Current – mA
1
0 25 50 75 100
100
ESR – Equivalent Series Resistance – Ω
10
V
IN
= 4.3 V
C
O
= 10 µF
3.3 V LDO
TPS76933
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE (ESR)
†
vs
OUTPUT CURRENT
Region of Instability
Region of Stability
0.1
0.2
Figure 20
Added Ceramic Capacitance – µF
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
1
100
ESR – Equivalent Series Resistance – Ω
10
Region of Instability
Region of Stability
V
IN
= 4.3 V
C
O
= 10 µF
I
L
= 100 mA
TPS76933
TYPICAL REGIONS OF STABILITY
EQUIVALENT SERIES RESISTANCE (ESR)
vs
ADDED CERAMIC CAPACITANCE