Hi all , how can i check noise in the particular LDO circuit ?

@Mohamed Monem Could you help here ?

@Piyush Dwivedi You could use:

.control
alter V1 AC=1  $LDO supply 
noise v(Vout) V1 dec 100 100 100K  $from 100Hz to 100KHz
setplot noise1
plot onoise_spectrum   $ output noise density
setplot noise2
print onoise_total  $ total integrated noise over that range 
reset
.endc

hi @Mohamed Monem,

Remove any comment and try again. The comment starts with the dollar sign $.

hi @Mohamed Monem showing same error . now what to do . please suggest