Diodes AP2121 - Manual (Page 22)

Data Sheet
22
Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121
Typical Performance Characteristics (Continued)
Figure 21. Load Transient
(Conditions: V
IN
=2.2V, C
IN
=1 μF, C
OUT
=1 μF)
V
OUT
(
0.1
V/D
iv)
Time (200 μs/Div)
AP2121-1.2
1.2
1.1
AP2121-3.0
Figure 20. Line Transient
(Conditions: I
OUT
=30mA, C
IN
=1 μF, C
OUT
=1 μF)
AP2121-3.0
Time (200 μs/Div)
Figure 22. Load Transient
(Conditions: V
IN
=4V, C
IN
=1 μF, C
OUT
=1 μF)
Time (20 μs/Div)
Δ
V
OUT
(0
.0
5
V
/D
iv
)
V
IN
(1
V
/D
iv
)
0
4
5
0.05
-0.05
6
1.3
I OUT
(1
00m
A/
Div)
0
200
3.0
2.9
3.1
100
V
OUT
(
0.
1V/
Div)
I OUT
(1
00
mA
/D
iv)
0
200
100
Figure 23. PSRR vs. Frequency
10 100 1k 10k 100k
0
10
20
30
40
50
60
70
80
90
100
PS
R
R
(d
B)
Frequency (Hz)
AP2121-1.2
V
IN
=2.2V
I
OUT
=30mA
C
IN
=C
OUT
=1 μ F