Solved
LDL40PUR Adjustable Voltage Setting
Hi ST Micro,
Please send me the information for the adjustable LDO output voltage desgined from R1 and R2 formula.
Peter BENSCHBest answer
ST Technical Moderator
November 17, 2025
Welcome
Unfortunately, the formula for calculating the resistors was not included in the data sheet. However, it is essentially the same as for many LDOs of the last few decades:
Vout = Vref*(1+R1/R2)+R1*Iadj
with Vref=1.2V (typ.), Iadj=0.5uA (max)
Hope that helps?
Regards
/Peter
In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.