Datasheet

TPS76515, TPS76518, TPS76525, TPS76527
TPS76528, TPS76530, TPS76533, TPS76550, TPS76501
ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS236 – AUGUST 1999
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 25
0.01
0.10
1.00
10.00
0 0.2 0.4 0.6 0.8 1.0
Added Ceramic Capacitance – µF
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
ADDED CERAMIC CAPACITANCE
ESR – Equivalent Series Resistance –
Ω
10
1
10
0
10
–1
10
–2
V
I
= 4.3 V
C
O
= 4.7 µF
V
O
= 3.3 V
T
A
= 25°C
Minimum ESR
Region of Instability
I
O
= 150 mA
Figure 26
Added Ceramic Capacitance – µF
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
ADDED CERAMIC CAPACITANCE
0.01
0.10
1.00
10.00
0 0.2 0.4 0.6 0.8 1.0
ESR – Equivalent Series Resistance –
Ω
10
1
10
0
10
–1
10
–2
V
I
= 4.3 V
V
O
= 3.3 V
C
O
= 10 µF
T
A
= 25°C
Minimum ESR
Region of Instability
10
1
I
O
= 150 mA
IN
EN
OUT
+
GND
C
O
ESR
R
L
V
I
To Load
Figure 27. Test Circuit for Typical Regions of Stability (Figures 20 through 23) (Fixed Output Options)
†
Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added
externally, and PWB trace resistance to C
O
.