The ceramic capacitors are placed after the tantalum capacitors. In this way, the best filtering effect can be obtained. The decoupling capacitor needs to meet two requirements, one is the capacity requirement and the other is the ESR requirement. That is to say, the decoupling effect of a 0.1uF capacitor may not be as good as that of two 0.01uF capacitors. Moreover, 0.01uF capacitors have lower impedance in higher frequency bands. If a 0.01uF capacitor can meet the capacity requirements in these frequency bands, it will have better decoupling effect than 0.1uF capacitors.