TPS717: Output voltage accuracy

Hello,

Thank you for your question.

You would need to consider both. When calculating for the adjustable option the VFB is separate from the output voltage. 

For example, with this equation: 

The output will have a separate accuracy from the feedback voltage. 

Please let me know if you have any additional questions or concerns.

Best,

Hannah

Thanks Hannah,

Your equation looks typo. I think R1 = [(Vout/Vfb) - 1] x R2 is right.

For my questions, in other words this equation as Vout;

 Vout = (1+(R1/R2))/Vref

So, Vout accuracy should be estimated by variations of R1, R2 and Vref. Do I understand correctly? 

Regards,

Kotaro Yamashita

Hannah,

Thanks for your reply. I saw a lot of similler thread that said equation is incorrect like this.

(+) TPS717: Calculating the output voltage of an LDO. - Power management forum - Power management - TI E2E support forums

Anyway, I understood we can consider Vout accuracy with vref, R1 and R2 variation.

Regards,

Kotaro Yamashita

Kotaro,

Thank you for this update. It seems like this was a datasheet error. I am sorry for the inconvenience.

Best,

Hannah