6.6 Typical Characteristics (continued)

at operating temperature TJ = 25°C, VIN = VOUT(NOM) + 1.0 V or 2.5 V (whichever is greater), IOUT = 1 mA, ON/OFF pin tied to

VIN, CIN = 1.0 µF, and COUT = 4.7 µF (unless otherwise noted)

Frequency - (Hz)

1x101

1x102

1x103

1x104

1x105

1x106

1x107

0

10

20

30

40

50

60

70

80

90

100

110

120

VIN = 5 V

V0 = 3.3 V

C0 = 4.7 uF

Cbyp = 10 nF

1 mA

10 mA

100 mA

Figure 6-25. Ripple Rejection vs Frequency for New Chip

0.001

0.01

0.1

1

10

10

100

1k

10k

100k

1M

Frequency − (Hz)

Ci = 1 mF

Co = 10 mF

VO = 3.3 V

10 mA

100 mA

1 mA

Figure 6-26. Output Impedance vs Frequency for Legacy Chip

0.001

0.01

0.1

1

10

10

100

1k

10k

100k

1M

Frequency − (Hz)

Ci = 1 mF

Co = 4.7 mF

VO = 3.3 V

10 mA

100 mA

1 mA

Figure 6-27. Output Impedance vs Frequency for Legacy Chip

0.01

0.1

1

10

100

1k

10k

100k

Frequency − (Hz)

Cbyp = 1 nF

Cbyp = 10 nF

Cbyp = 100 pF

ILOAD = 150 mA

Figure 6-28. Output Noise Density vs Frequency for Legacy

Chip

Frequency - (Hz)

1x101

1x102

1x103

1x104

1x105

1x106

1x107

0.001

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

10

CBYP

100 pF

1 nF

10 nF

Figure 6-29. Output Noise Density vs Frequency for New Chip

0.01

0.1

1

10

100

1k

10k

100k

Frequency − (Hz)

ILOAD = 1 mA

Cbyp = 1 nF

Cbyp = 10 nF

Cbyp = 100 pF

Figure 6-30. Output Noise Density vs Frequency for Legacy

Chip

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LP2985

SLVS522Q – JULY 2004 – REVISED DECEMBER 2022

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