BLE18PS080SN1 datasheet(12/33 Pages) TI

12 / 33 page

6.6 Typical Characteristics (continued)

VIN = 12 V, VOUT = 1.2 V, TA = 25°C, BOM = Table 8-1, (unless otherwise noted)

Frequency (Hz)

1x101

1x102

1x103

1x104

1x105

1x1063x106

0.0005

0.001

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

CNRSS = open, 15.3 VRMS

CNRSS = 220 nF, 14.3 VRMS

CNRSS = 470 nF, 14.3 VRMS

CNRSS = 2.2 F, 14.2 VRMS

5 V to 1.8 V

2.2 MHz

After ferrite bead filter

NR/SS = Open, 220 nF, 470 nF, 2.2 μF, BW = 100 Hz to 100 kHz

Figure 6-31. Output Noise Density vs Frequency

Frequency (Hz)

1x101

1x102

1x103

1x104

1x105

1x1063x106

0.0005

0.001

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

CNRSS = open, 19.1 VRMS

CNRSS = 220 nF, 16.6 VRMS

CNRSS = 470 nF, 16.1 VRMS

CNRSS = 2.2 F, 15.9 VRMS

5 V to 3.3 V

2.2 MHz

After ferrite bead filter

NR/SS = Open, 220 nF, 470 nF, 2.2 μF, BW = 100 Hz to 100 kHz

Figure 6-32. Output Noise Density vs Frequency

Frequency (Hz)

1x101

1x102

1x103

1x104

1x105

100

110

120

12Vin 1.2Vout 1A

12Vin 1.2Vout 2A

12Vin 1.2Vout 3A

12 V to 1.2 V

2.2 μH, 1 MHz

1 A, 2 A, 3 A

After ferrite bead filter

Figure 6-33. PSRR vs Frequency

Frequency (Hz)

1x101

1x102

1x103

1x104

1x105

100

110

120

12Vin 1.8Vout 1A

12Vin 1.8Vout 2A

12Vin 1.8Vout 3A

12 V to 1.8 V

2.2 μH, 1 MHz

1 A, 2 A, 3 A

After ferrite bead filter

Figure 6-34. PSRR vs Frequency

TPSM82913

SLVSGJ4A – OCTOBER 2022 – REVISED DECEMBER 2022

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