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TPS72301
TPS72325
SLVS346鈭扴EPTEMBER 2003
鈭?Output Voltage 鈭?mV
TPS72325
TPS72325
V OUT 鈭?Output Voltage 鈭?mV
10
100 k
TPS72325
V OUT 鈭?Output Voltage 鈭?mV
START-UP RESPONSE
0
1
2
0
1
2
3
CIN = 2.2
碌F,
COUT = 2.2
碌F,
IOUT = 50 mA,
Cbyp = 0.01
碌F
V IN 鈭?Input Voltage 鈭?V
0V
POWERUP-POWERDOWN
CIN = 2.2
碌F,
COUT = 2.2
碌F,
IOUT = 50 mA,
Cbyp = 0
碌F
START-UP RESPONSE
CIN= 2.2
碌F,
COUT = 2.2
碌F,
IOUT = 50 mA,
Cbyp = 0
碌F
鈭?Input Voltage 鈭?V
V IN 鈭?Input Voltage 鈭?V
V
OUT
鈭?.5 V
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
t 鈭?Time 鈭?ms
1
0
1
2
3
4
5
6
7
8
9
0
V
0.1 0. 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
2
t 鈭?Time 鈭?ms
t 鈭?Time 鈭?ms
IN
Figure 19
TPS72325
Figure 20
TPS72325
Figure 21
TPS72325
TOTAL NOISE
vs
C(NR) (10 Hz 鈭?100 kHz)
250
COUT = 2.2
碌F,
IOUT = 100 mA
COUT = 10
碌F,
IOUT = 100 mA
100
碌
V / div
COUT = 2.2
碌F,
IOUT = 25
碌A
COUT = 10
碌F,
IOUT = 25
碌A
CIN 鈭?.2
碌F
OUTPUT NOISE
vs
TIME
CIN 鈭?.2
碌F,
COUT = 2.2
碌F,
Cbyp = 0.01
碌F,
IOUT = 100 mA
10
碌
Hz
NOISE SPECTRAL DENSITY
vs
FREQUENCY
IOUT = 25
碌A
Noise Spectral Density 鈭?Vrms
200
Total Noise 鈭?/div>
碌
Vrms
1碌
IOUT = 100 mA
150
100
100 n
CIN = 0.01
碌F
,
COUT = 2.2
碌F,
Cbyp = 0.01
碌F,
10 n
100
1k
10 k
50
0
1
10
100
1k
10 k
100 k
t 鈭?Time 鈭? ms / div
C(NR) 鈭?pF
f 鈭?Frequency 鈭?Hz
Figure 22
TPS72325
Figure 23
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
PSRR 鈭?Power Supply Rejection Ratio 鈭?dB
80
70
60
50
40
30
20
10
0
鈭?0
10
VIN = 鈭? V,
CIN = 10
碌F,
COUT = 10
碌F,
Cbyp = 0
100
1k
10 k
IOUT = 200 mA
IOUT = 100 mA
IOUT = 1 mA
PSRR 鈭?Power Supply Rejection Ratio 鈭?dB
90
Figure 24
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
90
80
70
60
50
40
30
20
10
0
鈭?0
10
VIN = 鈭? V,
CIN = 10
碌F,
COUT = 10
碌F,
Cbyp = 0.01
100
1k
10 k
IOUT = 200 mA
IOUT = 1 mA
IOUT = 100 mA
NOISE SPECTRAL DENSITY
vs
FREQUENCY
10碌
Hz
Noise Spectral Density 鈭?Vrms
IOUT = 100 mA
1碌
100 n
IOUT = 25
碌A
CIN = 0
碌F,
COUT = 2.2
碌F,
Cbyp = 0.01
碌F,
1k
10 k
100 k
10 n
100
100 k
1M
100 k
1M
f 鈭?Frequency 鈭?Hz
f 鈭?Frequency 鈭?Hz
f 鈭?Frequency 鈭?Hz
Figure 25
Figure 26
Figure 27
7
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