Electronic – MC34063A step up voltage converter

Why not add a low dropout 12 volt voltage regulator instead of loading the output with resistors. It's likely to produce less heat. This will only work for very light loads like the one suggested and might keep spurious switching noise (from the boost converter) from interfering with the RF circuits and get better performance.

Turns out that since it is a switching regulator, it switches OFF completely when the output voltage is more than what it is designed for which is exactly what I don't want. I have shifted my design to MC34166 which is a PWM controlled DC-DC converter and everything seems to be working fine. I am getting an output voltage ripple of 10-15 mV peak to peak @ 5 V o/p and no such 10 Hz ripple.