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Original question:
Hello,
I found following model on LP38691-Q1 product page.
-LP38691_3P3 Unencrypted PSpice Transient Model
I need 2.5V output model but it seems 3.3V fixed output model.
Could you give me 2.5V output model?
I'm thinking of using LP38691QSD-2.5/NOPB on my PCB. Is it possible to have this module for PSpice?
Thank you!
Best regards,
Ângela Meireles
Hi Ângela,
In the .lib file, the 30.1k and 49.364k resistors are the feedback resistors (i.e. for this model VOUT = vref * (1+R1/R2) = 1.25 * (1+49.364 / 30.1 = 3.3V). If you change the 49.364k resistor to 30.1k, the output will be set to 2.5V.
Regards,
Nick
Hi Nick,
Thank you so much for the quick answer.
I changed the R_R4 = 30.1K, but the Vout remains very close to 3V.
I will send in attachment the image of the circuit and the output:
Could you help me?
Thank you very much!
Best regards,
Ângela Meireles
