MB39A104_06 Datasheet, PDF (31/38 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC with Overcurrent Protection

CH2
ESR
≤
∆VO
∆IL
−
1
2πfCL
≤
0.033
0.364
−
1
2π × 500 × 10³ × 82 × 10^−6
≤ 86.8 mΩ
Capacitance value
CH1
CL
≥
∆IL
2πf (∆VO − ∆IL × ESR)
≥
0.491
2π × 500 × 10³ × (0.050 − 0.491 × 0.05)
≥ 6.14 µF
CH2
CL
≥
∆IL
2πf (∆VO − ∆IL × ESR)
≥
0.364
2π × 500 × 10³ × (0.033 − 0.364 × 0.05)
≥ 7.83 µF
Ripple current
CH1
ICLrms ≥
(VIN − VO) ton
2√3L
≥
(19 − 5) × 0.263
2√3 × 15 × 10^−6 × 500 × 10³
≥ 141.7 mArms
CH2
ICLrms ≥
≥
(VIN − VO) ton
2√3L
(19 − 3.3) × 0.174
2√3 × 15 × 10^−6 × 500 × 10³
≥ 105.1 mArms
MB39A104
31