Wanted: SMPSU DC-out filtering

摘要

DC/DC converters! They're often quite useful, sometimes indispensable and most of the time very energy efficient. I am starting to apply them increasingly, following in the footsteps of real pros. The other day, while working on some battery powered circuits I found myself in need of a very efficient DC/DC converter to generate the voltages required by the circuit. While I was busy calculating the reservoir capacitor for the power supply, some thing came to mind I learned during my student days about passive filters and switchmode power supplies.