I'm looking at using an MC33063 buck/boost inverter in a QFN package to step down 5-30V to 4.2V. This will be used to power an MCU, some modules, LEDs cosuming about 200mA max, optionally to charge a small LiPo, so the 1.5A is more than enough. What I would like to know is if this is the correct way to go considering space is of the essence and I need to use as little extra parts as possible, ideally low part heights. The additional diode, resistors and caps I saw in example schematics could probably be made to fit. Everything is SMD. Can I expect to be able to go as low as 5Vin or more likely around 6V?
1.5A isn't mandatory, but I would rather not go down to 0.5A, just in case, so 1A is a good compromise.