Datasheet

Data Sheet ADP170/ADP171
Rev. C | Page 9 of 20
10 100 1k 10k 100k 1M 10M
07716-017
PSSR (dB)
FREQUENCY (Hz)
–
30
–40
–50
–60
–70
–80
–90
300mA
200mA
100mA
10mA
1mA
Figure 17. Power Supply Rejection Ratio vs. Frequency, V
OUT
= 3.0 V
10 100 1k 10k 100k 1M 10M
07716-118
PSSR (dB)
FREQUENCY (Hz)
–
30
–40
–50
–60
–70
–80
–90
3V, 1mA
1.8V, 1mA
0.8V, 1mA
3V, 300mA
1.8V, 300mA
0.8V, 300mA
Figure 18. Power Supply Rejection Ratio vs. Frequency, Various Output
Voltages and Load Currents
0.01
0.1
1
10
10 100 1k 10k 100k
µV/rt (Hz)
FREQUENCY (Hz)
0.8V
V
IN
= 3.6V
I
LOAD
= 10mA
C
OUT
= 1µF
1.8V
3.0V
07716-019
Figure 19. Output Noise Spectrum
0
10
20
30
40
50
60
70
0.001 0.01 0.1 1 10 100 1000
RMS NOISE (µV)
LOAD CURRENT (mA)
3V
1.8V
0.8V
07716-020
Figure 20. RMS Noise vs. Load Current and Output Voltage
07716-121
CH1 200mA Ω CH2 50.0mV
B
W
M40.00µs A CH1 124mA
1
2
T 160.680µs
I
LOAD
V
OUT
V
IN
= 3.6V
V
OUT
= 1.8V
1mA TO 300mA LOAD STEP,
2.5A/µs
Figure 21. Load Transient Response, C
IN
and C
OUT
= 1 μF
07716-122
CH1 200mA Ω CH2 50.0mV
B
W
M40.0µs A CH1 204mA
1
2
T 159.800µs
I
LOAD
V
OUT
V
IN
= 3.6V
V
OUT
= 1.8V
1mA TO 300mA LOAD STEP,
2.5A/µs
Figure 22. Load Transient Response, C
IN
and C
OUT
= 4.7 μF