Datasheet

7
6.5
6
5.5
5
4.5
4
3.5
3
V (V),0.5V/div
IN
50 s/divm
3.333
3.32475
3.3165
3.30825
3.3
3.29175
3.2835
3.27525
3.267
V (V),0.25%of3.3V/div
OUT
V
OUT
V =3.8V 4.8V 3.8V(1V/div)®
IN
®
I =500mA
OUT
1
10
100
1000
10 100 1000
C
NR
= C
BYPASS
(nF)
EN↑ to 90%V
OUT
(ms)
Using same value of C
NR
and C
BYPASS
in X axis
G300
3.85
V , V (V)
IN OUT
50 s/divm
I (A)
OUT
3.8
3.75
3.7
3.35
3.25
3.3
3.2
3.15
3.15
2.5
1.5
2
1
0.5
0
V (for reference)
IN
V
OUT
I = 100mA 1A 100mA (1A/ s)
OUT
m® ®
−0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
EN
OUT
Time (50 ms/div)
V
EN
, V
OUT
(V)
R
LOAD
= 33 Ω
C
IN
= 10 µF
C
OUT
= 10 µF
C
NR
= 470nF
C
BYPASS
= 470 nF
G005
−1
0
1
2
3
4
5
6
7
V
IN
= V
EN
V
OUT
Time (50 ms/div)
V
IN
, V
OUT
(V)
R
LOAD
= 33 Ω
C
IN
= 10 µF
C
OUT
= 10 µF
C
NR
= 470nF
C
BYPASS
= 470 nF
G006
TPS7A8101
www.ti.com SBVS179A –DECEMBER 2011–REVISED APRIL 2012
TYPICAL CHARACTERISTICS: TPS7A8101 (continued)
At V
OUT(TYP)
= 3.3 V, V
IN
= V
OUT(TYP)
+ 0.5 V or 2.2 V (whichever is greater), I
OUT
= 100 mA, V
EN
= V
IN
, C
IN
= 1 μF,
C
OUT
= 4.7 μF, and C
NR
= 0.01 μF; all temperature values refer to T
J
, unless otherwise noted.
STARTUP TIME
vs NOISE REDUCTION CAPACITANCE LINE TRANSIENT RESPONSE
Figure 26. Figure 27.
LOAD TRANSIENT RESPONSE ENABLE PULSE RESPONSE
(1)
Figure 28. Figure 29.
POWER-UP/POWER-DOWN RESPONSE
(1)
Figure 30.
(1) The internal reference requires approximately 80 ms of rampup time (see STARTUP) from the enable event;
therefore, V
OUT
fully reaches the target output voltage of 3.3 V in 80 ms from starup.
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