BLE18PS080SN1 datasheet(8/33 Pages) TI

8 / 33 page

6.6 Typical Characteristics (continued)

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

s/div

12 V to 1.8 V, 1 A

2.2 μH, 1 MHz

First and second L-C

Figure 6-7. VOUT Ripple After the Second L-C Filter

Frequency (Hz)

0x100

2x107

4x107

6x107

8x107

1x108

Spread Spectrum Modulation

OFF

Random

BW = 10 kHz

12 V to 1.8 V, 1 A

2.2 μH, 1 MHz

First and second L-C

Figure 6-8. VOUT Ripple FFT After the Second L-C Filter

s/div

12 V to 3.3 V, 1 A

2.2 μH, 2.2 MHz

First L-C Only

Figure 6-9. VOUT Ripple After the First L-C Filter

Frequency (Hz)

0x100

2x107

4x107

6x107

8x107

1x108

120

160

200

240

280

320

360

400

Spread Spectrum Modulation

OFF

Random

BW = 10 kHz

12 V to 3.3 V, 1 A

2.2 μH, 2.2 MHz

First L-C Only

Figure 6-10. VOUT Ripple FFT After the First L-C Filter

s/div

12 V to 3.3 V, 1 A

2.2 μH, 2.2 MHz First and second L-C

Figure 6-11. VOUT Ripple After the Second L-C Filter

Frequency (Hz)

0x100

2x107

4x107

6x107

8x107

1x108

Spread Spectrum Modulation

OFF

Random

BW = 10 kHz

12 V to 3.3 V, 1 A

2.2 μH, 2.2 MHz First and second L-C

Figure 6-12. VOUT Ripple FFT After the Second L-C Filter

TPSM82913

SLVSGJ4A – OCTOBER 2022 – REVISED DECEMBER 2022

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