Datasheet

ADP1706/ADP1707/ADP1708
Rev. 0 | Page 9 of 20
C
SS
(nF)
RAMP-UP TIME (ms)
18
0
02
5
40
–55
2.7 3.2 3.7 4.2 4.7
V
IN
(V)
PSRR (dB)
16
14
12
10
8
6
4
2
5101520
06640-023
Figure 22. Output Voltage Ramp-Up Time vs. Soft Start Capacitor Value
0
–90
10 10M
FREQUENCY (Hz)
PSRR (dB)
100 1k 10k 100k 1M
–10
–20
–30
–40
–50
–60
–70
–80
V
RIPPLE
= 50mV
V
IN
= 5V
V
OUT
= 3.3V
C
OUT
= 4.7μF
I
LOAD
= 300mA
I
LOAD
= 200mA
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 1mA
I
LOAD
= 100µA
06640-024
Figure 23. ADP1706 Power Supply Rejection Ratio vs. Frequency
0
–90
10 10M
FREQUENCY (Hz)
PSRR (dB)
100 1k 10k 100k 1M
–10
–20
–30
–40
–50
–60
–70
–80
V
RIPPLE
= 50mV
V
IN
= 5V
V
OUT
= 0.8V
C
OUT
= 4.7μF
I
LOAD
= 300mA
I
LOAD
= 200mA
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 1mA
I
LOAD
= 100µA
06640-025
Figure 24. ADP1708 Power Supply Rejection Ratio vs. Frequency
–45
–50
V
OUT
= 2.4V
V
OUT
= 1.6V
V
OUT
= 0.8V
V
RIPPLE
= 50mV
I
LOAD
= 10mA
C
OUT
= 4.7μF
FREQUENCY = 10kHz
06640-026
Figure 25. ADP1708 Power Supply Rejection Ratio vs. Input Voltage
35
–55
0.8 4.3
V
OUT
(V)
PSRR (dB)
–40
–45
–50
1.3 1.8 2.3 2.8 3.3 3.8
V
RIPPLE
= 50mV
V
IN
= 5V
I
LOAD
= 10mA
C
OUT
= 4.7μF
FREQUENCY = 10kHz
06640-027
Figure 26. ADP1708 Power Supply Rejection Ratio vs. Output Voltage