ADP122 데이터 시트보기 (PDF) - Analog Devices
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ADP122 Datasheet PDF : 24 Pages
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Data Sheet
–10
–20
IOUT = 100µA
–30
IOUT = 1mA
IOUT = 10mA
–40
IOUT = 100mA
IOUT = 200mA
–50
IOUT = 300mA
–60
–70
–80
VIN = VOUT + 0.5V
–90
VRIPPLE = 50mV
CIN = COUT 1µF
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 21. Power Supply Rejection Ratio vs. Frequency, VOUT = 4.2 V, VIN = 4.7 V
–10
–20
VOUT = 2.8V, IOUT = 1mA
–30
VOUT = 3.3V, IOUT = 1mA
VOUT = 4.2V, IOUT = 1mA
–40
VOUT = 2.8V, IOUT = 300mA
VOUT = 3.3V, IOUT = 300mA
–50
VOUT = 4.2V, IOUT = 300mA
–60
–70
–80
VIN = VOUT + 0.5V
VRIPPLE = 50mV
–90
CIN = COUT 1µF
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 22. Power Supply Rejection Ratio vs. Frequency, Various Output
Voltages and Load Currents
–10
VIN = 3.1V, IOUT = 1mA
–20
VIN = 3.3V, IOUT = 1mA
VIN = 3.8V, IOUT = 1mA
VIN = 4.8V, IOUT = 1mA
–30
VIN = 3.1V, IOUT = 300mA
VIN = 3.3V, IOUT = 300mA
–40
VIN = 3.8V, IOUT = 300mA
VIN = 4.8V, IOUT = 300mA
–50
–60
–70
–80
VRIPPLE = 50mV
CIN = COUT 1µF
–90
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 23. Power Supply Rejection Ratio vs. Headroom Voltage (VIN − VOUT),
VOUT = 2.8 V
ADP122/ADP123
5
VOUT = 4.2V
4
VOUT = 3.3V
3
2
1
VOUT = 2.8V
0
10
100
1k
10k
FREQUENCY (Hz)
Figure 24. Output Noise Spectrum
100k
70
65
VOUT = 4.2V
60
VOUT = 3.3V
55
50
45
VOUT = 2.8V
40
35
30
0.001
0.01
0.1
1
10
IOUT (mA)
100
1000
Figure 25. Output Noise vs. Load Current and Output Voltage
IOUT
1mA TO 300mA LOAD STEP
1
2
VOUT
VIN = 3.7V
VOUT = 3.3V
CH1
200mA
Ω
B
W
CH2
50.0mV
B
W
M 40.0µs
A CH1
196mA
T 10.20%
Figure 26. Load Transient Response, COUT = 1 μF
Rev. E | Page 9 of 24
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