Datasheet

350
300
250
200
150
100
50
0
100 1k 10k 100k
Frequency (Hz)
Spectral Noise Density (nV/
√
Hz)
I
OUT
= 250 mA
C
NR
= 0.1
µ
F
V
OUT
= 2.8 V
I
OUT
= 10 mA
2.0
1.75
1.5
1.25
1.0
0.75
0.5
0.25
0
100 1k 10k 100k
Frequency (Hz)
Spectral Noise Density (
µ
V/
√
Hz)
0.001
µ
F
0.047
µ
F
0.01
µ
F
0.1
µ
F
C
OUT
= 10
µ
F
I
OUT
= 250 mA
V
OUT
= 2.8 V
80
70
60
50
40
30
20
10
0
PSRR (dB)
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
V
OUT
= 2.8 V
C
OUT
= 2.2
µ
F
C
NR
= 0.01
µ
F
I
OUT
= 1 mA
I
OUT
= 250 mA
80
70
60
50
40
30
20
10
0
PSRR (dB)
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
V
OUT
= 2.8 V
C
OUT
= 10
µ
F
C
NR
= 0.01
µ
F
I
OUT
= 1 mA
I
OUT
= 250 mA
80
70
60
50
40
30
20
10
0
PSRR (dB)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
V
IN
−
V
OUT
(V)
f = 1 kHz
f = 10 kHz
f = 100 kHz
V
OUT
= 2.8 V
I
OUT
= 250 mA
C
OUT
= 10
µ
F
C
NR
= 0.01
µ
F
TPS71202, TPS71219
TPS71229, TPS71247
TPS71256, TPS71257
SBVS049D –MAY 2004–REVISED AUGUST 2010 www.ti.com
TYPICAL CHARACTERISTICS (continued)
For all voltage versions at T
J
= 25°C, V
IN
= V
OUT(nom)
+ 1 V, I
OUT
= 1 mA,V
EN
= 1.2 V, C
OUT
= 2.2 mF, and C
NR
= 0.01 mF,
unless otherwise noted.
NOISE SPECTRAL DENSITY
C
OUT
= 10 mF NOISE SPECTRAL DENSITY vs C
NR
Figure 19. Figure 20.
PSRR (RIPPLE REJECTION) vs FREQUENCY PSRR (RIPPLE REJECTION) vs FREQUENCY
Figure 21. Figure 22.
PSRR (RIPPLE REJECTION) vs V
IN
- V
OUT
Figure 23.
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