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10 100 1 k 10 k
20
60
100
100 k 1 M 10 M
Ripple Rejection − dB
f − Frequency − Hz
TPS79328
RIPPLE REJECTION
vs
FREQUENCY
V
I
= 3.8 V
C
o
= 2.2 µF
C
(byp)
= 0.01 µF
I
O
= 10 mA
I
O
= 200 mA
40
70
90
30
50
80
10
0
10 100 1 k 10 k
20
60
100
100 k 1 M 10 M
Ripple Rejection − dB
f − Frequency − Hz
TPS79328
RIPPLE REJECTION
vs
FREQUENCY
V
I
= 3.8 V
C
o
= 2.2 µF
C
(byp)
= 0.1 µF
I
O
= 10 mA
I
O
= 200 mA
40
70
90
30
50
80
10
0
10 100 1 k 10 k
10
40
80
100 k 1 M 10 M
Ripple Rejection − dB
f − Frequency − Hz
TPS79328
RIPPLE REJECTION
vs
FREQUENCY
I
O
= 10 mA
50
0
V
I
= 3.8 V
C
o
= 10 µF
C
(byp)
= 0.01 µF
I
O
= 200 mA
20
30
60
70
90
100
t − Time − µs
TPS79328
LOAD TRANSIENT RESPONSE
0
0 15010050 200 250 350300 400 450
20
0
−20
V
O
Output Voltage − mV
∆
− Change In
100
500
− Output Current − mA
I
O
V
I
= 3.8 V
C
o
= 10 µF
−40
200
300
di
dt
+
0.02A
µs
1mA
TPS79328
LINE TRANSIENT RESPONSE
V
O
t − Time − µs
0 302010 40 50 7060 80 90 100
− Output Voltage − mV
I
O
= 200 mA
C
o
= 2.2 µF
C
(byp)
= 0.01 µF
V
I
− Input Voltage −
0
-20
3.8
dv
dt
+
0.4 V
µs
mV
20
4.8
3
TPS79328
OUTPUT VOLTAGE, ENABLE VOLTAGE
vs
TIME (START-UP)
V
O
t − Time − µs
0 604020 80 100 140120 160 180 200
− Output Voltage − V
V
I
= 3.8 V
V
O
= 2.8 V
I
O
= 200 mA
C
o
= 2.2 µF
T
J
= 25°C
Enable Voltage − V
1
2
0
0
2
C
(byp)
= 0.0047 µF
C
(byp)
= 0.01 µF
4
C
(byp)
= 0.001 µF
500 mV/div
1s/div
POWER UP / POWER DOWN
V
I
V
O
V
O
= 3 V
R
L
= 15 Ω
100
50
0 20 40 60 80 100 120
DC Dropuoy Voltage − mV
150
200
DC DROPOUT VOLTAGE
vs
OUTPUT CURRENT
250
140 160 180 200
0
I
O
− Output Current − mA
T
J
= 125°C
T
J
= 25°C
T
J
= −55°C
0
50
100
150
200
2.5 3 3.5 4 4.5 5
TPS79301
DROPOUT VOLTAGE
vs
INPUT VOLTAGE
V
I
− Input Voltage − V
− Dropout Voltage − mV
V
DO
I
O
= 200 mA
T
J
= 25°C
T
J
= −40°C
T
J
= 125°C
TPS79301-EP , , TPS79318-EP , , TPS79325-EP , , TPS79328-EP
TPS793285-EP , TPS79330-EP , TPS79333-EP , TPS793475-EP
SGLS163B – APRIL 2003 – REVISED NOVEMBER 2006
TYPICAL CHARACTERISTICS (continued)
Figure 10. Figure 11. Figure 12.
Figure 13. Figure 14. Figure 15.
Figure 16. Figure 17. Figure 18.
8
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