C(BYPASS) – Bypass Capacitance – F

m

0

10

20

30

40

50

60

70

0.001

0.01

0.1

VOUT = 3.3 V

VOUT = 1.8 V

100

1k

10k

100k

CBYPASS= 0.1 F

m

CBYPASS= 0.01 F

m

f – Frequency – Hz

CBYPASS= 0.001 F

m

CBYPASS= 0.0047 F

m

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

100

1k

10k

100k

IOUT = 1 mA

IOUT = 100 mA

f – Frequency – Hz

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

100

1k

10k

100k

IOUT = 1 mA

IOUT = 100 mA

f – Frequency – Hz

100

1k

10k

100k

IOUT = 1 mA

IOUT = 100 mA

f – Frequency – Hz

0

0.05

0.1

0.15

0.2

0.25

100

1k

10k

100k

CBYPASS= 0.1 F

m

CBYPASS= 0.01 F

m

f – Frequency – Hz

CBYPASS= 0.001 F

m

0

0.2

0.4

0.6

0.8

1

1.2

CBYPASS= 0.0047 F

m

7

TPS791

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SLVS325D – MARCH 2001 – REVISED FEBRUARY 2018

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Copyright © 2001–2018, Texas Instruments Incorporated

Typical Characteristics (continued)

at TJ = 25°C, VIN = VOUT(typ) + 1 V, IOUT = 1 mA, EN = 0 V, COUT = 10 µF, and CBYPASS = 0.01 µF (unless otherwise noted)

VIN = 2.8 V, COUT = 10 µF, CBYPASS = 0.1 µF

Figure 7. TPS79118 Output Spectral Noise Density vs

Frequency

VIN = 2.8 V, IOUT = 100 mA, COUT = 10 µF

Figure 8. TPS79118 Output Spectral Noise Density vs

Frequency

VIN = 4.3 V, COUT = 1 µF, CBYPASS = 0.1 µF

Figure 9. TPS79133 Output Spectral Noise Density vs

Frequency

VIN = 4.3 V, COUT = 10 µF, CBYPASS = 0.1 µF

Figure 10. TPS79133 Output Spectral Noise Density vs

Frequency

VIN = 4.3 V, IOUT = 100 mA, COUT = 10 µF

Figure 11. TPS79133 Output Spectral Noise Density vs

Frequency

BW = 100 Hz to 100 kHz

Figure 12. Root Mean Squared Output Noise vs

Bypass Capacitance