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TVS for VBAT should be placed close to module's pin VBAT_BB and VBAT_RF.
VBAT traces should be away from sensitive signal traces such as SDIO, USB, SGMII, USB audio
and RF to avoid paralleling or crossing with them.
A layer with VBAT traces and reference ground plane is recommended. When a power plane is used,
a complete ground plane should be added in adjacent layer as the reference plane.
Figure 7: VBAT & Sensitive Signal Traces (TE-A 1st Layer)
EC2x&EG2x-G_Series_PCB_Design_Guideline
TVS
GND
Figure 6: Traces of VBAT with a TVS (TE-A 4th Layer)
VABT
VABT
USB
USB
interface
interface
SD card
SD card
interface
interface
EC2x&EG2x-G Series PCB Design Guideline
Antenna
Antenna
Interfaces
Interfaces
Keepout
Keepout
area
area
WLAN
WLAN
interface
interface
SGMII
SGMII
interface
interface
LTE Standard Module Series
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