Diodes AP2202 - Manual (Page 19)

150mA RF ULDO REGULATOR AP2202
Data Sheet
19
Jul. 2011 Rev. 2. 2 BCD Semiconductor Manufacturing Limited
10 100 1k 10k 100k 1M 10M
0.001
0.01
0.1
1
Ou
tp
u
t N
o
is
e
(
)
Frequency (Hz)
AP2202-2.8
C
IN
=1.0 µ F, C
OUT
=2.2 µ F, C
BYP
=100pF
V
IN
=4.5V, I
OUT
=10mA
10
Figure 8. Enable Current vs. Junction Temperature Figure 9. Enable Voltage vs. Junction Temperature
-60 -40 -20 0 20 40 60 80 100 120 140
0
2
4
6
8
10
12
14
16
18
20
V
EN
=1.8V
V
EN
=2.0V
V
EN
=3.0V
V
EN
=4.0V
V
IN
=3.8V, C
IN
=1.0 µ F
C
OUT
=2.2 µ F, I
OUT
=100 µ A
E
na
ble Current
(
µ
A)
Junction Temperature ( o C)
AP2202-2.8
-60 -40 -20 0 20 40 60 80 100 120 140
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Junction Temperature ( o C)
Enable Volt
a
ge
(V)
AP2202-2.8
V
EN
=on
V
EN
=off
C
IN
=1.0 µ F,C
OUT
=2.2 µ F
V
IN
=3.8V,I
OUT
=5mA
Typical Performance Characteristics (Continued)
Figure 10. Noise vs. Bypass Capacitor
10 100 1000 10000
0
50
100
150
200
Noise (
µ
Vr
m
s)
Bypass Capacitor (pF)
I
OUT
=10mA
C
IN
=1.0 µ F, C
OUT
=2.2 µ F
Noise Measurement Filter: DIN Noise
Figure 11. Output Noise vs. Frequency
µV/ Hz