Diodes AP2125 - Manual (Page 20)

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2125
Data Sheet
20
BCD Semiconductor Manufacturing Limited Sep. 2012 Rev. 1. 5
Figure 34. PSRR
Typical Performance Characteristics (Continued)
10 100 1k 10k 100k
0
10
20
30
40
50
60
70
80
90
100
PS
R
R
(
dB)
Frequency (Hz)
AP2125-1.8
V
IN
=2.8V
I
OUT
=30mA
10 100 1k 10k 100k
0
10
20
30
40
50
60
70
80
90
100
PS
RR (dB
)
Frequency (Hz)
AP2125-3.3
V
IN
=4.3V
I
OUT
=30mA
Figure 35. PSRR
Figure 32. Enable Input Response and Auto-discharge
(Conditions: V
CE
=0 to 3V, C
IN
=1 μF,
C
OUT
=1 μF, V
IN
=3V, no load)
V
CE
(1
V/D
iv)
v OUT
(1
V/D
iv)
Time (200 μs/Div)
AP2125-2.8
1
3
2
1
3
2
0
0
Figure 33. ESR vs. Output Current
0 50 100 150 200 250 300
0.1
1
10
100
1000
Stable Area
AP2125-1.8
C
IN
= 1 μ F
C
OUT
= 1 μ F
ESR (
Ω
)
Output Current (mA)