AN4630 datasheet(25/33 Pages) STMICROELECTRONICS

부품명	AN4630

상세설명	PCB design guidelines for the BlueNRG and BlueNRG-MS devices

PDF	33 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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AN4630

Design recommendations when using

WLCSP34 package

Figure 20: WLCSP34 ground connection (INNER3 layer view)

To guarantee the RF performances with the DC-DC converter ON it is important to have an

effective filtering between VBAT1 and SMPS_GND pins. This filtering is obtained using

some filtering capacitors are shown in Figure 21: "Focus on power supply pins". The C6

and C8 capacitors between the VBAT1 and the SMPS_GND have to be put as close as

possible to the WLCSP. The width of the connection tracks has to be increased as much as

possible. The TOP layer or the INNER2 layer has to be used to route these tracks.

DocID027262 Rev 1

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AN4630 데이터시트(PDF) 25 Page - STMicroelectronics