Building a DC converter, need suggestions for IC

[vgamesx2]

Basically, I'm wanting a portable power supply, so my requirements are an input of 3V (I don't mind implementing a BMS for a 2S or 3S pack but obviously that isn't prefered) and I would like a minimum of 3V-24V output although what I'm really looking for is closer to 1V-40V and because it'll be running off a battery I want an efficiency of at least 90%, I know of a few ICs that are fit for the task such as the LTC3780, however my problem is that unless you're ordering 100s of them they cost around $10 a pop, which is why I'm asking on here, does anyone know of something similar to the LTC3780 but won't cost as much as buying a premade board and ripping the chip of it?

[danadak]

If you go onto many manufacturer websites, and places like digikey, you can do
filtered searches to narrow down your choices, many which have unit prices.

Just a thought.


Regards, Dana.

[T3sl4co1l]

It rather sounds like you don't know what you want, and therefore you're going to have to pay for it...

This is a single cell boost supply that can be wired as an adjustable CV/CC bench supply,
https://www.eevblog.com/forum/projects/building-a-simple-switching-circuit/msg1252706/#msg1252706
but as a boost, it will only go down to battery voltage.  Change the output stage to a SEPIC configuration to include zero output.

Tim