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ADP7157 Datasheet(数据表) 11 Page - Analog Devices

部件型号  ADP7157
说明  High PSRR, RF Linear Regulator
下载  23 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 

 11 page
background image
ADP7158
Data Sheet
Rev. A | Page 10 of 22
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.5
0.6
0.7
0.8
0.9
HEADROOM VOLTAGE (V)
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
Figure 23. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage
at Various Frequencies, VOUT = 3.3 V, 2 A Load
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
1
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
ILOAD =10mA
ILOAD =100mA
ILOAD =600mA
ILOAD =1200mA
ILOAD =2000mA
Figure 24. Power Supply Rejection Ratio (PSRR) vs. Frequency
at Various Loads, VOUT = 1.8 V, VIN = 2.6 V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
1
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
900mV
800mV
700mV
600mV
500mV
Figure 25. Power Supply Rejection Ratio (PSRR) vs. Frequency
at Various Headroom Voltages, VOUT = 1.8 V, 2 A Load
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.5
0.6
0.7
0.8
0.9
HEADROOM VOLTAGE (V)
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
Figure 26. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage
at Various Frequencies, VOUT = 1.8 V, 2 A Load
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
1
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
CBYP =1µF
CBYP =10µF
CBYP = 100µF
CBYP = 1000µF
Figure 27. Power Supply Rejection Ratio (PSRR) vs. Frequency
at Various CBYP Values, VOUT = 3.3 V, VIN = 4.0 V, 2 A Load
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
10m
100m
1
10
LOAD CURRENT (A)
10Hz TO 100kHz
100Hz TO 100kHz
Figure 28. RMS Output Noise vs. Load Current




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