Datasheet

TPS767D301-Q1, TPS767D318-Q1, TPS767D325-Q1
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
SGLS231A − FEBRUARY 2004 − JUNE 2008
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 21
ESR − Equivalent Series Resistance −
Ω
0.1
0 200 400 600 800 1000
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
OUTPUT CURRENT
10
I
O
− Output Current − mA
1
0.01
V
O
= 3.3 V
C
o
= 4.7 μF
V
I
= 4.3 V
T
A
= 25°C
Region of Stability
Region of Instability
Region of Instability
Figure 22
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
OUTPUT CURRENT
I
O
− Output Current − mA
ESR − Equivalent Series Resistance −
Ω
0.1
0 200 400 600 800
1000
10
1
0.01
Region of Instability
V
O
= 3.3 V
C
o
= 4.7 μF
V
I
= 4.3 V
T
J
= 125°C
Region of Stability
Region of Instability
Figure 23
ESR − Equivalent Series Resistance −
Ω
0.1
0 200 400 600 800 1000
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
OUTPUT CURRENT
10
I
O
− Output Current − mA
1
Region of Instability
Region of Stability
V
O
= 3.3 V
C
o
= 22 μF
V
I
= 4.3 V
T
A
= 25°C
0.01
Region of Instability
Figure 24
ESR − Equivalent Series Resistance −
Ω
TYPICAL REGION OF STABILITY
EQUIVALENT SERIES RESISTANCE
†
vs
OUTPUT CURRENT
0.1
0 200 400 600 800 1000
10
1
I
O
− Output Current − mA
Region of Stability
Region of Instability
V
O
= 3.3 V
C
o
= 22 μF
V
I
= 4.3 V
T
J
= 125°C
0.01
Region of Instability
†
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
.