Quectel LC86l capacitor for power supply

[Adam_Sz]

Dear Sir/Madam,

I am currently using the Quectel LC86L module with an Arduino Pro Mini. The entire system is powered at 3.3V. In my circuit, I have a MOSFET that disconnects the main VCC power supply to the Quectel module, but the VBAT pin remains connected to 3.3V (from arduino).

I would like to ask if this setup is appropriate at this voltage level, or would you recommend adding additional capacitors for stability?

Thank you in advance for your support.

[YongHuang]

Hi @Adam_Sz

Apologies for the late reply

Can you confirm the module you are using is L80-R or LC86L?

I am replying based on the SCH provide which is L80-R

Please follow the hardware design reference shown in the picture

Best regards