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Wireless

Yanyan
New Contributor

Hi

I'm using the CYW43907 in a custom board. 

The MCU is powered from a buck that converts to 3.6V.

But for the VDDIO, I want voltage of 3.3V, because the MCU communicates with components with logic of 3.3V.

I don't want to add an external LDO, so I want to use the internal LDO (LDO3P3). My question is can I use LDO3P3 to power VDDIO, or do I have to use an external source.

 

Thanks

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1 Reply
Vivek_gunapati
Employee

Hi ,

From the description we understand that you would like to use the CYW43907's internal LDO to source the VDDIO. From the datasheet  https://www.cypress.com/file/298236/download#page=33 we see the Pin 118 is an LDO out pin. 

Currently we are checking with the internal team if we could use the 118 Vout_3p3 to source the other VDDIO pins in LDO3P3 internal LDO mode. 

 

Regards

Vivek.