LM317A: ESR Range for LDO Output Stability

Part Number: LM317A

Tool/software:

I have a question regarding the ESR of the output capacitor for the LDO. My customer is considering LM317A.

The datasheet mentions "An optional output capacitor can be added to improve transient response and can be replaced with a ceramic and appropriate ESR.",

but could you please provide the acceptable ESR range?  This information is necessary to ensure output stability.

Regards,

Komatsuda