Datasheet

TPS72201, TPS72215
TPS72216, TPS72218
SLVS390B – DECEMBER 2001 – REVISED MAY 2002
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5
TYPICAL CHARACTERISTICS
Figure 1
1.7996
1.7997
1.7998
1.7999
1.8000
1.8001
1.8002
0 1020304050
I
O
– Output Current – mA
TPS72218
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
– Output Voltage – V
V
O
V
I
= 2.8 V
C
o
= 1 µF
T
J
= 25° C
Figure 2
1.7900
1.7920
1.7940
1.7960
1.7980
1.8000
1.8020
–40 –25 –10 5 20 35 50 65 80 95 110 125
T
J
– Junction Temperature – °C
TPS72218
OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
– Output Voltage – V
V
O
I
O
= 50 mA
I
O
= 1 mA
V
I
= 2.8 V
C
o
= 1 µF
Figure 3
–40 –25 –10 5 20 35 50 65 80 95 110 125
T
J
– Junction Temperature – °C
TPS72218
GROUND CURRENT
vs
JUNCTION TEMPERATURE
Ground Current –
V
I
= 2.8 V
C
o
= 1 µF
I
O
= 10 mA
I
O
= 50 mA
0
50
100
150
200
250
300
Aµ
Figure 4
0
50
100
150
200
250
300
I
O
– Output Current – mA
TPS72218
GROUND CURRENT
vs
OUTPUT CURRENT
Ground Current – Aµ
T
J
= 25° C
T
J
= 125° C
0 5 20 30 40 50
T
J
= –40° C
V
I
= 2.8 V
C
o
= 1 µF
10 15 25 35 45
Figure 5
TPS72218
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0
0.5
1
1.5
2
2.5
100 1 k 10 k 100 k
f – Frequency – Hz
I
O
= 50 mA
V
I
= 2.8 V
C
o
= 1 µF
V/ HzOutput Spectral Noise Density –
µ
Figure 6
f – Frequency – Hz
I
O
= 1 mA
V
I
= 2.8 V
C
o
= 1 µF
I
O
= 50 mA
TPS72218
OUTPUT IMPEDANCE
vs
FREQUENCY
Output Impedance – Ω
1
0.1
0.01
1 10 100 1 k 10 k
10
100 k 1 M 10 M
0.001
100
1 k
Figure 7
0
10
20
30
40
50
60
70
80
–40 –25 –10 5 20 35 50 65 80 95 110 125
I
O
= 50 mA
I
O
= 10 mA
V
I
= 2.8 V
C
o
= 1 µF
T
J
– Junction Temperature – °C
– Dropout Voltage – mV
V
DO
TPS72218
DROPOUT VOLTAGE
vs
JUNCTION TEMPERATURE
Figure 8
0
10
20
30
40
50
60
70
1 10 100 1 k 10 k 100 k 1 M
Power Supply Ripple Rejection – dB
f – Frequency – Hz
TPS72118
POWER SUPPLY RIPPLE REJECTION
vs
FREQUENCY
V
I
= 2.8 V
C
o
= 1 µF
I
O
= 50 mA
Fi
g
ure 9
TPS72218
OUTPUT VOLTAGE, ENABLE VOLTAGE
vs
TIME (START-UP)
V
O
t – Time – µs
0 15010050 200 200 350300 400 450 500
– Output Voltage – V
V
I
= 2.8 V
V
O
= 1.8 V
I
O
= 50 mA
C
o
= 1 µF
Enable Voltage – V
1
2
1
0
2
3
V
EN
V
O
0