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How to measure LDO PSRR?

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bicave

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How to measure LDO PSRR? and LDO PSRR @Iload=100mA.
I cannot make a power with defined noise can support 100mA load.

Do you have any comment, pls!
 

psrr ldo measure

bicave said:
How to measure LDO PSRR? and LDO PSRR @Iload=100mA.
I cannot make a power with defined noise can support 100mA load.

Do you have any comment, pls!

just set AC=1 to vdd source and assure Rl so Iload equals 100mA

plot output vs frequency
 

ldo testing

Is for simulation or testing in lab?
For lab testing, you can generate a supply with sine-wave noise by a NMOS source follower whose gate is driving by a sinewave from function generator.
 

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