Electronics > Projects, Designs, and Technical Stuff

Trade-off between LDO max Iout AND PSRR

(1/1)

promach:
PSRR is inversely proportional to output impedance of LDO.

But Iout_max of LDO is proportional to width of output mosfet (M20) , Rds of M20 is inversely proportional to width of M20.

Given that output impedance is a parallel impedance configuration between Rds of M20 and (R1+R2), so Iout_max is proportional to output impedance of LDO.

If I need Iout_max = 3A, then my PSRR result looks very very bad.









Navigation

[0] Message Index

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod