Datasheet

V
OUT2
V
OUT1
I
OUT1
2 mV/div
100 mV/div
200 mA/div
20
µ
s/div
250 mA
10 mA
C
OUT2
= 10
µ
F
C
OUT1
= 10
µ
F
60
50
40
30
20
10
0
Channel Isolation (dB)
0.1 1 10 100 1k
Frequency (Hz)
C
OUT1
= C
OUT2
= 10
µ
F
I
OUT1
= 0 mA to 500 mA Sinusoidal Load
I
OUT2
= 25 mA
1 V/div
50 ms/div
V
IN
V
OUT1
V
OUT2
I
OUT1
= I
OUT2
= 250 mA
20 mV/div
1 V/div
V
OUT2
V
OUT1
V
EN1
50
µ
s/div
C
NR
= 0.001
µ
F
C
NR
= 0.01
µ
F
I
OUT1
= I
OUT2
= 250 mA
C
OUT1
= C
OUT 2
= 10
µ
F
250
200
150
100
50
0
Total Noise (
µ
Vrms)
1 10 100 1k 10k 100k
C
NR
(pF)
C
OUT
= 2.2
µ
F
I
OUT
= 250 mA
C
OUT
= 10
µ
F
I
OUT
= 250 mA
C
OUT
= 2.2
µ
F
I
OUT
= 0 mA
C
OUT
= 10
µ
F
I
OUT
= 0 mA
V
OUT
= 2.8 V
350
300
250
200
150
100
50
0
100 1k 10k 100k
Frequency (Hz)
Spectral Noise Density (nV/
√
Hz)
I
OUT
= 250 mA
C
NR
= 0.1
µ
F
V
OUT
= 2.8 V
I
OUT
= 1 mA
TPS71202, TPS71219
TPS71229, TPS71247
TPS71256, TPS71257
www.ti.com SBVS049D –MAY 2004–REVISED AUGUST 2010
TYPICAL CHARACTERISTICS (continued)
For all voltage versions at T
J
= 25°C, V
IN
= V
OUT(nom)
+ 1 V, I
OUT
= 1 mA,V
EN
= 1.2 V, C
OUT
= 2.2 mF, and C
NR
= 0.01 mF,
unless otherwise noted.
TPS71256
LOAD TRANSIENT RESPONSE TPS71256
AND V
OUT2
CROSSTALK CHANNEL-TO-CHANNEL ISOLATION vs FREQUENCY
Figure 13. Figure 14.
TPS71256
TURN-ON/OFF RESPONSE TPS71229
AND V
OUT2
CROSSTALK POWER-UP/POWER-DOWN
Figure 15. Figure 16.
NOISE SPECTRAL DENSITY
TOTAL NOISE vs C
NR
C
OUT
= 2.2 mF
Figure 17. Figure 18.
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