Generate 22-30 volts from 12

I need to generate a voltage between 22 and 30 (for vfd tubes) from 12 volts (DC). It also has to have a minimum current output of 60mA (really 54, but I like to have some leeway). I really want to use something without an inductor (charge pump?) because I'm also driving nixies in the same area and I already have a lot going on. I would love to have something similar to the ICL7662 (essentially a voltage doubler, only uses a chip, 2 caps, and 2 diodes), but as far as I can tell it can't deliver enough power. I can't find any chip that's what I want... Help?

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guyfrom7up (author) 9 years ago
well, after a day of searching I think I'll just byte it and use an inductor with a max1771. I'm really mad because I already have a max1771 in the circuit and it seems over complicated to just double the voltage...
110100101109 years ago
555 + voltage multiplier ? i think it can give enough current if you use capacitors of appropriate size and power transistor output depends on the frequency of the 555 as well
The frequency is determined by the resistor / capacitor combination.
NachoMahma9 years ago
Um, that schematic shows an inductor....