ADP1755 Analog Devices, ADP1755 Datasheet - Page 9

• Manufacturer Part Number: ADP1755
• Description: 1.2A Low-Vin, Adjustable-Vout LDO Linear Regulator
• Manufacturer: Analog Devices

Figure 19. Noise Spectral Density vs. Output Voltage, I
0.01
2
1
0.1
Figure 17. Line Transient Response, Load Current = 1200 mA
10
70
60
50
40
30
20
10
0.0001
1
CH1
0
10
Figure 18. Noise vs. Load Current and Output Voltage
500mV
T
3V TO 3.5V INPUT VOLTAGE STEP, 2V/µs
0.001
B
W
100
CH2 5mV
LOAD CURRENT (A)
FREQUENCY (Hz)
0.01
5mV/DIV
0.75V
2.5V
1.5V
V
B
V
OUT
W
IN
1k
M10µs
T
9.60%
0.1
1.5V
V
C
OUT
IN
A CH4
= C
10k
2.5V
0.75V
= 1.5V
OUT
1
LOAD
= 4.7µF
800mV
= 10 mA
100k
10
Rev. B | Page 9 of 20
–100
–100
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
0
10
10
10
Figure 20. Power Supply Rejection Ratio vs. Frequency,
Figure 22. Power Supply Rejection Ratio vs. Frequency,
Figure 21. Power Supply Rejection Ratio vs. Frequency,
1.2A
800mA
400mA
100mA
10mA
1.2A
800mA
400mA
100mA
10mA
1.2A
800mA
400mA
100mA
10mA
100
100
100
V
OUT
V
V
OUT
OUT
1k
1k
1k
= 0.75 V, V
= 1.5 V, V
= 2.5 V, V
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
10k
10k
10k
ADP1754/ADP1755
IN
IN
IN
= 1.75 V
= 2.5 V
= 3.5 V
100k
100k
100k
1M
1M
1M
10M
10M
10M