Using TPS3839G33DQNR for brown-out protection

Hey all,

I’m working on a battery-powered sensor node project (sending data to the cloud), and I decided to integrate the TPS3839G33DQNR reset supervisor to catch brown-outs and keep the MCU from behaving weird when the battery sags. Everything seems fine when I power it steady, but I’m seeing issues:

During battery drops (LED flash + radio transmit), the sensor node sometimes locks up instead of resetting cleanly.

I wired the TPS3839 to my 3.3 V rail but shared that rail with the radio module. I’m wondering if the radio's current spike is messing with the supervisor’s threshold. Also, I’m not totally clear if I should add a small capacitor on the reset pin or extra decoupling near it.

Has anyone used the TPS3839G33DQNR in a similar IoT/sensor build? I’d love solid advice on how to wire it for reliable resets, layout tips, and extra decoupling tricks when sharing the rail with a radio.

Thanks a ton for your help!