Hi,
Not finding exactly what I'm looking for as an off-the-shelf module part, I am now looking at putting together my own circuit for a DC-DC supply. Top-level specs are:
- Input dc voltage: 9-11V (from battery)
- Output dc voltage: 38-42V (set by pot.)
- Output ripple: 30mV max.
- Average Load current: 30mA
- Peak load current: 240mA
- Good load regulation in general
- Simple (i.e. not too many discrete components), small footprint & efficient.
Any suggestions of ICs and hopefully complete circuit drawing are greatly appreciated.
Thanks.
David
UPDATE:
I used Webench and it pointed me towards the LM3478. The circuit looks good from most points of view, but while load regulation looks fine, the ripple looks a bit high at ~350mV during high current demand (0.3A) when I ran the simulation. Any ideas for reducing this ripple with this IC, or maybe with another IC?
Cheers