Min. voltage 1.8V or 2.0V?

LPWAN Modules / EVBs RAK3172
1

Hello,

there are different statements on the minimum operating voltage.
RAK3172 datasheet says 2.0V, but detailled operating voltage section says 1.8V for all LoRa related domains,
spec of the breakout says 1.8V overall,
STM32WL5-PWR whitepaper says 1.95V,
STM32E5 reference manual says 1.8V (section 5.3.3 Transmitter).

What’s correct?

Also, I can only measure the stated 39.1mA for the LP variant at 1.8V, at 2.0V get 41mA…

2

See here
https://community.st.com/t5/stm32-mcus-wireless/stm32wlx5-min-lora-operating-voltage/m-p/894484#M28105

1 Like
3

Thanks for sharing Robert.

We have to update the docs for SIP breakout. All our RAK3172 are just up to 2.0v min.