Use CADJ to improve ripple rejection.
CADJ prevents amplification of the
ripple when the output voltage is adjusted higher.
The impact of CADJ on the ripple
rejection performance is captured in the Electrical Characteristics table.
Ci is recommended, particularly if the
regulator is not in close proximity to the
power-supply filter capacitors. A 0.1µF or 1µF
ceramic or tantalum capacitor provides sufficient
bypassing for most applications, especially when
adjustment and output capacitors are used.
CO improves transient response, but is not needed for stability.
Protection diode D2 is recommended if CADJ is used. The diode provides a low-impedance discharge path to prevent the capacitor from discharging into the output of the regulator.
Protection diode D1 is recommended if CO is used. The diode provides a low-impedance discharge path to prevent the capacitor from discharging into the output of the regulator.