SNVSBY7 March 2021 TPS92390
Recommended voltage rating for output capacitors is 50% higher than maximum output voltage level. Capacitance value determines voltage ripple and boost stability. The DC-bias effect can reduce the effective capacitance significantly, by up to 80%, a consideration for capacitance value selection. The conservative target effective capacitance is 50 µF to achieve good phase and gain margin levels. A design table in product webpage could be refered for the target effective capacitance in a certain application. TI recommends using 33-µF Al-polymer electrolytic capacitor together with 10-µF ceramic capacitors in parallel to reduce ripple, increase stability, and reduce ESR effect.