BLE18PS080SN1 datasheet(11/33 Pages) TI

11 / 33 page

6.6 Typical Characteristics (continued)

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

6 V to 1.2 V, 1 A

2.2 μH, 1 MHz

BW = 50 Hz

S-CONF = OFF, Triangular, Random

Figure 6-25. Spread Spectrum FFT - 50-Hz BW

12 V to 1.2 V, 2 A

2.2 μH, 1 MHz

BW = 10 kHz

S-CONF = OFF, Triangular, Random

Figure 6-26. Spread Spectrum FFT - 10-kH BW

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, 25.8 VRMS

CNRSS = 220 nF, 27.4 VRMS

CNRSS = 470 nF, 27.3 VRMS

CNRSS = 2.2 F, 25 VRMS

12 V to 1.2 V

1 MHz

After ferrite bead filter

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

Figure 6-27. 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, 27.5 VRMS

CNRSS = 220 nF, 25.7 VRMS

CNRSS = 470 nF, 25.9 VRMS

CNRSS = 2.2 F, 25.9 VRMS

12 V to 1.8 V

1 MHz

After ferrite bead filter

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

Figure 6-28. 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, 19.6 VRMS

CNRSS = 220 nF, 17 VRMS

CNRSS = 470 nF, 16.6 VRMS

CNRSS = 2.2 F, 16.3 VRMS

12 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 6-29. 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, 13.8 VRMS

CNRSS = 220 nF, 13.3 VRMS

CNRSS = 470 nF, 13.2 VRMS

CNRSS = 2.2 F, 13.2 VRMS

5 V to 1.2 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 6-30. Output Noise Density vs Frequency

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TPSM82913

SLVSGJ4A – OCTOBER 2022 – REVISED DECEMBER 2022

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