TI recommends 1200 μF of ceramic output
capacitance for VOUTA, as well as 5500 μF of additional polymer-type
capacitance. The recommended amount of output capacitance for VOUTB is 400
μF of ceramic capactiance, as well as 1800 μF of additional polymer-type
capacitance. The ceramic capacitance helps to reduce ripple while the
polymer-type supplies current to reduce voltage deviations during a load
transient.
This
application uses 1200 μF (12 × 100 μF, 6.3 V, 1210 case size) of
ceramic capacitance, as well as 7520 μF (16 × 470 μF, 6.3 V) of
polymer-aluminum capacitance.