13.24.1.2 Flying Capacitor

The flying capacitor should be chosen to charge to a minimum of 95% (3τ) of V_DDH within one half of a switching cycle.

3 × τ = T_CHG
τ = T_CHG/3
RC = T_CHG/3
C = T_CHG/(R × 3)
C = 6.67 µs/([7.5Ω + 3.5Ω + 0.02Ω]  3)
C = 202 nF

Choose a 180 nF capacitor.

DS70005628A

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