/diy/ - Do It Yourself

>>1790278
depends. do you mind making sum and difference frequencies of all those odd harmonics too? that should be ok for RF mixing but could be bad for audio effects

>>1790287
the usual pattern for especially sensitive devices is to follow a switching converter with a low-dropout linear regulator. set the step-up output to the desired output + dropout voltage at the desired current + 500mV or so of margin
of course you should pay due attention to *engineering* your step-up. grab the MC34063 datasheet and use their design equations and advice where applicable. most of the equations apply to any switcher of a given topology. use a low-Rds(on) PMOS for the switch, a Schottky diode, an appropriately fast opamp for the PWM and a proper comparator for the comparator. the faster your switching frequency, the lower your voltage ripple will be (the rate of current change is determined mainly by the inductor but you'll be switching directions more frequently)
and are you really sure you don't want to use one of those 1MHz+ step-up converter blocks in a SOT23-6 package
>inb4 but I don't have any in stock
that was your first mistake