Hi!
I am designing my own sigfox board using S2LPTX module, some sensors and a ST microcontroller. Microcontroller and sensors are working on 1.8 V supply. I know that S2LPTX module can work with VBAT = 1.8 V, but in section 3.2 it mentions VBAT should be at 2 V minimum for it to work in boost mode.
Often is the case, that a common supply source VBAT is used for VDDSMPS (pin 1), VDDVCOTX (pin 10) and VDDDIG (pin 15). Since in my design, microcontroller and sensors are working with 1.8 V supply, I would like to use two supply rails for S2LPTX module. 1.8 V - 3.6 V rail for VDDSMPS (pin 1) and VDDVCOTX (pin 10), and a fixed 1.8 V rail for VDDDIG (pin 15). Is this possible/allowed?
Shortly speaking, can i use S2LPTX sigfox transmitter with variable 1.8 V - 3.6 V rail for VDDSMPS (pin 1) and VDDVCOTX (pin 10), and a fixed 1.8 V rail for VDDDIG (pin 15)?
Kind regards,
Gayas
