TPS7A80xx
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SBVS135A –JUNE 2010–REVISED JUNE 2010
TYPICAL CHARACTERISTICS: TPS7A8001 (continued)
At VOUT(TYP) = 3.3V, VIN = VOUT(TYP) + 0.5V or 2.2V (whichever is greater), IOUT = 100mA, VEN = VIN, CIN = 1mF, COUT = 4.7mF, and
CNR = 0.01mF, TJ = 25°C, unless otherwise noted.
POWER-SUPPLY RIPPLE REJECTION
vs DROPOUT VOLTAGE
POWER-SUPPLY RIPPLE REJECTION
vs DROPOUT VOLTAGE
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
IOUT = 100mA
No CIN
IOUT = 750mA
No CIN
f = 1kHz
f = 1kHz
f = 10kHz
f = 100kHz
f = 1MHz
f = 10kHz
f = 100kHz
f = 1MHz
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
VDO (V)
VDO (V)
Figure 21.
Figure 22.
OUTPUT SPECTRAL NOISE DENSITY
vs FREQUENCY
OUTPUT SPECTRAL NOISE DENSITY
vs FREQUENCY
100
10
100
10
RMS Noise (100Hz to 100kHz)
48.14VRMS (CNR = 1nF)
RMS Noise (100Hz to 100kHz)
47.95VRMS (COUT = 4.7mF)
47.33VRMS (CNR = 10nF)
45.90VRMS (CNR = 100nF)
VDO = 0.5V
47.33VRMS (COUT = 22mF)
47.42VRMS (COUT = 47mF)
VDO = 0.5V
IOUT = 100mA
IOUT = 100mA
1
1
0.1
0.01
0.1
0.01
COUT = 4.7mF
COUT = 22mF
COUT = 47mF
CNR = 1nF
CNR = 10nF
CNR = 100nF
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
Figure 23.
Figure 24.
OUTPUT SPECTRAL NOISE DENSITY
vs FREQUENCY
100
RMS Noise (100Hz to 100kHz)
92.07VRMS (IOUT = 10mA)
47.95VRMS (IOUT = 100mA)
46.87VRMS (IOUT = 750mA)
VDO = 0.5V
10
1
0.1
0.01
IOUT = 10mA
IOUT = 100mA
IOUT = 750mA
10
100
1k
10k
100k
Frequency (Hz)
Figure 25.
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