Datasheet

10 100 1k 10k
Frequency(Hz)
100k
10
1
0.1
0.01
OutputSpectralNoiseDensity( V/ )Öm Hz
V =1.2V
V =3V
C =10 F
OUT
IN
OUT
C =2.2 F
C =10nF
IN
NR/SS
m
m
RMSNOISE
10Hzto100kHz 100Hzto100kHz
I
OUT
1mA
150mA
15.44 14.14
17.27 16.46
I =150mA
OUT
I =1mA
OUT
10 100 1k 10k
Frequency(Hz)
100k
10
1
0.1
0.01
OutputSpectralNoiseDensity( V/ )m ÖHz
V =1.2V
V =3V
I =150mA
C =10 F
OUT
IN
OUT
OUT
C =2.2 F
IN
m
m
RMSNOISE
10Hzto100kHz 100Hzto100kHz
C
NR/SS
0nF
10nF
69.04
67.87
16.58
15.86
C =0nF
NR/SS
C =10nF
NR/SS
10 100 1k 10k
Frequency(Hz)
100k
10
1
0.1
0.01
OutputSpectralNoiseDensity( V/ )Öm Hz
I =1mA
C =10 F
OUT
C =2.2 F
C =10nF
C =10nF
IN
NR
BYP
m
m
OUT
RMSNOISE
10Hzto100kHz 100Hzto100kHz
V
OUT(NOM)
5V
1.2V
21.15
14.74
15.44 14.14
V =
OUT(NOM)
1.2V
V =5V
OUT(NOM)
TPS7A49xx
www.ti.com SBVS121B –AUGUST 2010–REVISED JANUARY 2010
TYPICAL CHARACTERISTICS (continued)
At T
J
= –40°C to +125°C, V
IN
= V
OUT(NOM)
+ 1.0V or V
IN
= 3.0V (whichever is greater), V
EN
= V
IN
, I
OUT
= 1mA, C
IN
= 2.2mF, C
OUT
= 2.2mF, C
NR/SS
= 0nF, and the FB pin tied to OUT, unless otherwise noted.
OUTPUT SPECTRAL NOISE DENSITY vs OUTPUT CURRENT
Figure 19.
OUTPUT SPECTRAL NOISE DENSITY vs C
NR/SS
Figure 20.
OUTPUT SPECTRAL NOISE DENSITY vs V
OUT(NOM)
Figure 21.
Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 9