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WEBENCH® Tools/TPS61099: suggested output capacitor from WEBENCH® Power designer

Part Number: TPS61099

Tool/software: WEBENCH® Design Tools

Hello to all,

customer did a simulation of the TPS61099 with the WEBENCH® Power Designer :

Vin 2.0V – 2.8V (2.2V nom)
Vout 3.1V
Iout max = 20mA


Values ​​up to 3.3μF are suggested by the TI WEBBENCH Power Designer for the output capacitor Cout.
However,in the data sheet of the TPS61099, section 9.2.1.1.5 mention that the minimal value of the output capacitor Cout equals 20μF.

Are the 20uF just required for much higher output currents than the 20mA?
Can you confirm this assumption and can they use for the 20mA an output capacitor value significantly smaller than 20uF?

Thanks in advance!
Best regards,
Brian