Datasheet

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Time(ms)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OutputVoltage(mV)
InputVoltage(V)
C
IN
=2.2mF
C
OUT
=2.2mF
I =50mA
OUT
C
NR
=0.01mF
0
1
2
0
1
2
3
Time(ms)
0 1 2 3 4 5 6 7 8 9 10
Voltage(V)
C
IN
=2.2mF
C
OUT
=2.2mF
I =50mA
OUT
C
NR
=0mF
0
0.5
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
V
OUT
V
IN
Time(1ms/div)
OutputNoise(100
V/div)
m
C 2.2m
IN
= - F,C m
OUT
=2.2 F
I =0.01m
OUT
=100mA,C
NR
F
250
200
150
100
50
0
C (pF)
NR
1 10 100 1k 10k 100k
T
otalNoise( V )m
RMS
C =2.2
OUT OUT
mF,I =100mA
C =10
OUT OUT
mF,I =100mA
C =2.2 F,Im
OUT OUT
=25mA
C =10 F,Im
OUT OUT
=25mA
C =2.2m
IN
F
10m
1m
100n
10n
Frequency(Hz)
100 1k 10k 100k
NoiseSpectralDensity(V / )ÖHz
R
MS
C =0.01 F
IN
m
C =2.2 F
OUT
m
C =0.01 F
NR
m
I =100mA
OUT
I =25 A
OUT
m
10m
1m
100n
10n
Frequency(Hz)
100 1k 10k 100k
NoiseSpectralDensity(V / )ÖHz
R
MS
C =0 F
IN
m
C =2.2 F
OUT
m
C =0.01 F
NR
m
I =100mA
OUT
I =25 A
OUT
m
TPS72301
TPS72325
SLVS346B – SEPTEMBER 2003 – REVISED JULY 2007
TYPICAL CHARACTERISTICS (continued)
TPS72325 at V
IN
= V
OUTnom
– 0.5V, I
OUT
= 1mA, V
EN
= 1.5V, C
OUT
= 2.2 μ F, and C
NR
= 0.01 μ F, unless otherwise noted.
TPS72325 TPS72325
START-UP RESPONSE POWER-UP/POWER-DOWN
Figure 19. Figure 20.
TPS72325
TOTAL NOISE vs C
NR
TPS72325
(10Hz to 100kHz) OUTPUT NOISE vs TIME
Figure 21. Figure 22.
TPS72325 TPS72325
NOISE SPECTRAL DENSITY vs FREQUENCY NOISE SPECTRAL DENSITY vs FREQUENCY
Figure 23. Figure 24.
8
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