Manual

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
=1μF, C
OUT
=1μF)
V
OUT
(0.1V/Div)
Time (200μs/Div)
AP2121-1.2
1.2
1.1
AP2121-3.0
Figure 20. Line Transient
(Conditions: I
OUT
=30mA, C
IN
=1μF, C
OUT
=1μF)
AP2121-3.0
Time (200μs/Div)
Figure 22. Load Transient
(Conditions: V
IN
=4V, C
IN
=1μF, C
OUT
=1μF)
Time (20μs/Div)
Δ
V
OUT
(0.05V/Div)
V
IN
( 1 V / D i v )
0
4
5
0.05
-0.05
6
1.3
I
OUT
(100mA/Div)
0
200
3.0
2.9
3.1
100
V
OUT
(0.1V/Div)
I
OUT
(100mA/Div)
0
200
100
Figure 23. PSRR vs. Frequency
10 100 1k 10k 100k
0
10
20
30
40
50
60
70
80
90
100
PSRR (dB)
Frequency (Hz)
AP2121-1.2
V
IN
=2.2V
I
OUT
=30mA
C
IN
=C
OUT
=1μF