Datasheet

ADP322/ADP323 Data Sheet
Rev. A | Page 12 of 24
LOAD = 1mA
LOAD = 5mA
LOAD = 10mA
LOAD = 50mA
LOAD = 100mA
LOAD = 200mA
0
20
40
60
80
100
120
140
160
1.70 1.80 1.90 2.00 2.10
V
IN
(V)
GROUND CURRENT (µA)
09288-027
Figure 29. Ground Current vs. Input Voltage (in Dropout), V
OUT2
= 1.8 V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
PSRR (dB)
200mA
100mA
10mA
1mA
V
RIPPLE
= 50mV
V
IN
= 2.8V
V
OUT
= 1.8V
C
OUT
= 1µF
FREQUENCY (Hz)
10 100 1k 10k 100k 1M 10M
09288-028
Figure 30. Power Supply Rejection Ratio vs. Frequency, 1.8 V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
PSRR (dB)
FREQUENCY (Hz)
10 100 1k 10k 100k 1M 10M
200mA
100mA
10mA
1mA
V
RIPPLE
= 50mV
V
IN
= 4.3V
V
OUT
= 3.3V
C
OUT
= 1µF
09288-029
Figure 31. Power Supply Rejection Ratio vs. Frequency, 3.3 V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
PSRR (dB)
FREQUENCY (Hz)
10 100 1k 10k 100k 1M 10M
200mA
100mA
10mA
1mA
V
RIPPLE
= 50mV
V
IN
= 2.5V
V
OUT
= 1.5V
C
OUT
= 1µF
09288-030
Figure 32. Power Supply Rejection Ratio vs. Frequency, 1.5 V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
FREQUENCY (Hz)
PSRR (dB)
1.8V/200mA
1.8V/100mA
1.8V/10mA
1.2V/200mA
1.2V/100mA
1.2V/10mA
V
RIPPLE
= 50mV
1V HEADROOM
1.8V PSRR
1.2 XTALK
10 100 1k 10k 100k 1M 10M
09288-031
Figure 33. Power Supply Rejection Ratio vs. Frequency,
Channel-to-Channel Crosstalk
0.01
0.1
1
10
10 100 1k 10k 100k
NOISE SPECTR
A
L DENSITY (nV/
√
Hz)
3.3V
1.8V
1.5V
FREQUENCY (Hz)
09288-032
Figure 34. Output Noise Spectral Density vs. Frequency, V
IN
= 5 V,
I
LOAD
= 10 mA