9 Application Information9.1 Capacitor SelectionThe switching frequency of the IC is in the range of 150kHz ~450kHz. Since MLCC ceramic capacitor has good highfrequency filtering with low ESR, above 60μF X5R or X7Rcapacitors with higher voltage rating then operating voltagewith margin is recommended. For example, if the highestoperating Vin/Vout voltage is 12V, select at least 16Vcapacitor and to secure enough margin, 25V voltage ratingcapacitor is recommended.The high capacitance polymer capacitor or tantalumcapacitor can be used for input and output but capacitorvoltage rating must be higher than the highest operatingvoltage with enough margin. The high frequencycharacteristics of these capacitors are not as good asceramic capacitor, so at least 10μF ceramic capacitor shouldbe placed in parallel to reduce high frequency ripple.