TPS79225DBVR datasheet(8/38 Pages) TI2

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5.6 Typical Characteristics (continued)

f – Frequency – Hz

10k

100k

IO = 1 mA

VI = 3.8 V

Co = 1 µF

C(byp) = 0.1 µF

100

IO = 100 mA

TPS79228

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

0.05

0.1

0.15

0.2

0.25

0.3

Legacy chip

Figure 5-7. TPS792 Output Spectral Noise Density vs Frequency

f – Frequency – Hz

10k

100k

IO = 1 mA

100

IO = 100 mA

TPS79228

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

VI = 3.8 V

Co = 10 µF

C(byp) = 0.1 µF

0.05

0.1

0.15

0.2

0.25

0.3

Legacy chip

Figure 5-8. TPS792 Output Spectral Noise Density vs Frequency

f – Frequency – Hz

10k

100k

100

TPS79228

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

VI = 3.8 V

IO = 100 mA

Co= 10 µF

C(byp) = 0.1 µF

C(byp) = 0.001 µF

C(byp) = 0.0047 µF

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

C(byp) = 0.01 µF

Legacy chip

Figure 5-9. TPS792 Output Spectral Noise Density vs Frequency

Frequency (Hz)

0.2

0.4

0.6

0.8

1.2

1.4

1.6

100

10k

100k

10M

IOUT, VNOISE [BW (10Hz, 100KHz)]

100mA, 69.9

VRMS

1mA, 67.5

VRMS

New chip

Figure 5-10. TPS792 Output Spectral Noise Density vs

Frequency

0.001

0.01

0.1

TPS79228

ROOT MEAN SQUARED OUTPUT NOISE

BYPASS CAPACITANCE

C(byp) – Bypass Capacitance – µF

VI = 3.8 V

VO = 2.8 V

Io = 100 mA

Co = 10 µF

BW = 100 Hz to 100

kHz

Legacy chip

Figure 5-11. Root Mean Squared Output Noise vs Bypass

Capacitance

100

1 M

1 k

f – Frequency – Hz

10 k

TPS79228

OUTPUT IMPEDANCE

FREQUENCY

100 k

IO = 1 mA

0.5

1.5

2.5

IO = 100 mA

10 M

VI = 3.8 V

Co = 10 µF

TJ = 25° C

Legacy chip

Figure 5-12. Output Impedance vs Frequency

TPS792

SLVS337E – MARCH 2001 – REVISED JANUARY 2025

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