Datasheet
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I
OUT
= 10 mA
I
OUT
= 250 mA
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
C
IN
= 1 µF,
C
OUT
= 2.2 µF,
C
NR
= 0.01 µF
40
20
10
10 100 1 k 10 k
60
70
Frequency (Hz)
90
100 k 1 M 10 M
0
30
50
80
Ripple Rejection (dB)
I
OUT
= 10 mA
I
OUT
= 250 mA
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
C
IN
= 1 µF,
C
OUT
= 10 µF,
C
NR
= 0.01 µF
40
20
10
10 100 1 k 10 k
Ripple Rejection (dB)
60
70
Frequency (Hz)
90
100 k 1 M 10 M
0
30
50
80
I
OUT
= 10 mA
I
OUT
= 250 mA
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
C
IN
= 1 µF,
C
OUT
= 2.2 µF,
C
NR
= 0.1 µF
40
20
10
10 100 1 k 10 k
60
70
Frequency (Hz)
90
100 k 1 M 10 M
0
30
50
80
Ripple Rejection (dB)
0
250
−50
0
50
0 30 60 90 120 150 180 210
Time (µs)
V
IN
= 4.3 V,
C
OUT
= 10 µF
di
dt
+
0.02A
ms
I
OUT
(mA)∆V
OUT
(mV)
V_Enable
3
Time (µs)
0 24016080 320 400 560480 640 720 800
1
2
0
0
2
4
C
NR
= 0.0047 µF
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
I
OUT
= 250 mA,
C
OUT
= 2.2 µF
C
NR
= 0.001 µF
V
OUT
, V
EN
(V)
Time (µs)
−30
−20
−10
0
10
4.5
5.0
5.5
6.0
0 100 200 300 400 500
I
OUT
= 250 mA,C
OUT
= 10 µF,
C
NR
= 0.1 µF, dv/dt = 1 V/µs
V
IN
(V)∆V
OUT
(mV)
0
50
100
150
200
0 250
T
A
= 125°C
T
A
= 25°C
T
A
= −40°C
I
OUT
(mA)
25 50 75 100 125 150 175 200 225
V
DO
(mV)
0
50
100
150
200
250
2.5 3.5
4.0
T
A
= 125°C
T
A
= 25°C
V
IN
(V)
C
OUT
= 10 µF,
C
NR
= 0.01 µF,
I
OUT
= 250 mA
3.0 4.5
5.0
T
A
= −40°C
V
DO
(mV)
−0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 1.4 2.8 4.2 5.6 7.0 8.4 9.8
V
OUT
V
IN
Power-Up (500 mV/div)
t (ms)
V
OUT
= 2.5 V,
R
L
= 10 Ω
TPS794xx
SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005
TYPICAL CHARACTERISTICS (continued)
TPS79433 TPS79433 TPS79433
RIPPLE REJECTION RIPPLE REJECTION RIPPLE REJECTION
vs FREQUENCY vs FREQUENCY vs FREQUENCY
Figure 11. Figure 12. Figure 13.
TPS79433
OUTPUT VOLTAGE, TPS79433 TPS79433
ENABLE VOLTAGE LINE TRANSIENT LOAD TRANSIENT
vs TIME (START-UP) RESPONSE RESPONSE
Figure 14. Figure 15. Figure 16.
TPS79425 TPS79433 TPS79401
POWER-UP/ DROPOUT VOLTAGE DROPOUT VOLTAGE
POWER-DOWN vs OUTPUT CURRENT vs INPUT VOLTAGE
Figure 17. Figure 18. Figure 19.
6
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