Although a feed-forward capacitor (C_FF) from the FB pin to the OUT pin is not required to achieve stability, a
10-nF external feed-forward capacitor optimizes the transient, noise, and PSRR performance. A higher capacitance C_FF can be used; however, the start-up time is longer, and the PG signal can incorrectly indicate that the output voltage is settled. For a detailed description, see the Pros and Cons of Using a Feed-Forward Capacitor with a Low Dropout Regulator application report.