JAJSR60F August 2008 – June 2020 TPS40210-Q1 , TPS40211-Q1
PRODUCTION DATA
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Since a boost converter has continuous input current, the input capacitor senses only the inductor ripple current. The input capacitor value can be calculated by Equation 47 and Equation 48.
For this design, to meet a maximum input ripple of 60 mV, a minimum 7.0-μF input capacitor with ESR less than 30 mΩ is needed. A 10-μF X7R ceramic capacitor is selected.