ADP2140 datasheet(16/32 Pages) AD

16 / 32 page

ADP2140

Data Sheet

Rev. B | Page 16 of 32

VIN1 = 5 V, VIN2 = 2.3 V, VOUT2 = 1.8 V, IOUT2 = 10 mA, CIN2 = COUT2 = 1 µF, TA = 25°C, unless otherwise noted.

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

100

10k

100k

10M

FREQUENCY (Hz)

300mA

100mA

10mA

1mA

Figure 54. Power Supply Rejection Ratio vs. Frequency, VOUT2 = 3.3 V,

VIN1 = 5 V, VIN2 = 4.3 V

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

100

10k

100k

10M

FREQUENCY (Hz)

300mA

100mA

10mA

1mA

Figure 55. Power Supply Rejection Ratio vs. Frequency, VOUT2 = 1.8 V,

VIN1 = 5 V, VIN2 = 2.8 V

0.01

0.1

100

10k

100k

FREQUENCY (Hz)

1.2V

1.8V

2.5V

3.3V

Figure 56. Output Noise Spectrum, VIN2 = 5 V, Load Current = 10 mA

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

100

10k

100k

10M

FREQUENCY (Hz)

300mA

200mA

100mA

10mA

1mA

Figure 57. Power Supply Rejection Ratio vs. Frequency, VOUT2 = 3.3 V,

VIN1 = 5 V, VIN2 = 3.8 V

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

100

10k

100k

10M

FREQUENCY (Hz)

300mA

200mA

100mA

10mA

1mA

Figure 58. Power Supply Rejection Ratio vs. Frequency VOUT2 = 1.8 V,

VIN1 = 5 V, VIN2 = 2.3 V

100

100n

1µ

10µ

100µ

10m

100m

LOAD CURRENT (A)

1.2V

1.8V

2.5V

3.3V

Figure 59. Output Noise vs. Load Current and Output Voltage

VIN2 = 5 V

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