When designing Bluetooth PCBs (e.g., JieLi AC695N/AC696N), pay attention to DC-DC layout:
• Prioritize short, wide ground paths – avoid long thin traces.
• Place decoupling caps near chip pins.
• Keep DCDC away from antenna, near battery.
• Inductor close to SW pin, no vias, no components underneath (especially MIC).
• FB sampling after output cap; divider resistors near FB pin.











