MB39A104
CH2
ESR
∆VO
∆IL
1
≤
≤
−
2πfCL
0.033
0.364
1
−
2π × 500 × 103 × 82 × 10−6
≤ 86.8 mΩ
Capacitance value
CH1
∆IL
CL
≥
2πf (∆VO − ∆IL × ESR)
0.491
≥
2π × 500 × 103 × (0.050 − 0.491 × 0.05)
≥ 6.14 µF
CH2
∆IL
2πf (∆VO − ∆IL × ESR)
0.364
2π × 500 × 103 × (0.033 − 0.364 × 0.05)
CL
≥
≥
≥ 7.83 µF
Ripple current
CH1
(VIN − VO) ton
2√3L
(19 − 5) × 0.263
2√3 × 15 × 10−6 × 500 × 103
ICLrms ≥
≥
≥ 141.7 mArms
CH2
(VIN − VO) ton
ICLrms ≥
2√3L
(19 − 3.3) × 0.174
2√3 × 15 × 10−6 × 500 × 103
≥
≥ 105.1 mArms
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