Datasheet

1400
1300
1200
1100
1000
900
800
700
600
500
0
500 1000 1500 2000 2500
DropoutVoltage(mV)
I (mA)
OUT
3000
+125 C°
+25 C°
-40 C°
V =V
IN BIAS
80
70
60
50
40
30
20
10
0
10
100 1k 10k 100k 1M
Power-SupplyRejectionRatio(dB)
Frequency(Hz)
10M
I =3.0A
OUT
100
90
80
70
60
50
40
30
20
10
0
10
100 1k 10k 100k 1M
Power-SupplyRejectionRatio(dB)
Frequency(Hz)
10M
V =1.8,V =1.5V
IN OUT OUT
,I =1.5A
C =0 F
OUT
m
C =10 F
OUT
m
C =100 F
OUT
m
100
90
80
70
60
50
40
30
20
10
0
10
100 1k 10k 100k 1M
Power-SupplyRejectionRatio(dB)
Frequency(Hz)
10M
V =1.8,V =1.5V
IN OUT OUT
,I =100mA
C =10 F
OUT
m
C =100 F
OUT
m
C =0 F
OUT
m
100
90
80
70
60
50
40
30
20
10
0
10
100 1k 10k 100k 1M
Power-SupplyRejectionRatio(dB)
Frequency(Hz)
10M
V =1.8,V =1.5V
IN OUT OUT
,I =3A
C =100 F
OUT
m
C =0 F
OUT
m
C =10 F
OUT
m
90
80
70
60
50
40
30
20
10
0
0
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25
Power-SupplyRejectionRatio(dB)
V V-
IN OUT
(V)
2.50
1kHz
100kHz
300kHz
700kHz
C =22 F
I =1.5A
m
OUT
OUT
TPS74401-EP
SBVS122B –MARCH 2010–REVISED SEPTEMBER 2010 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
J
= +25°C, V
OUT
= 1.5 V, V
IN
= V
OUT(TYP)
+ 0.3 V, V
BIAS
= 3.3 V, I
OUT
= 50 mA, C
IN
= 1 mF, C
BIAS
= 1 mF, C
SS
= 0.01 mF, and
C
OUT
= 10 mF, unless otherwise noted.
V
BIAS
DROPOUT VOLTAGE vs
I
OUT
AND TEMPERATURE (T
J
) V
BIAS
PSRR vs FREQUENCY
Figure 9. Figure 10.
V
IN
PSRR vs FREQUENCY V
IN
PSRR vs FREQUENCY
Figure 11. Figure 12.
V
IN
PSRR vs FREQUENCY V
IN
PSRR vs V
IN
– V
OUT
Figure 13. Figure 14.
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