Схемы, платы, компоненты

При маленьком выходном (менее 2,2uF = для X7R 4.7uF) может возникнуть генерация, в описании есть график зависимости этой ёмкости от выходного тока. Также специально делали тонкую дорожку с R>=5 мОм c выхода для подключения 1210 X7R 22uF 6,3/10V Входной конденсатор м.б. и 0,1 норм, но 1 мкФ дубово на все случаи жизни.

Important: The output capacitor must maintain its ESR within the stable region over the full operating temperature range of the application to assure stability. The LP2985 requires a minimum of 2.2 μF on the output (output capacitor size can be increased without limit). It is important to remember that capacitor tolerance and variation with temperature must be taken into consideration when selecting an output capacitor so that the minimum required amount of output capacitance is provided over the full operating temperature range. It should be noted that ceramic capacitors can exhibit large changes in capacitance with temperature (see next section, Capacitor Characteristics).