http://focus.ti.com/lit/ds/symlink/ptn78060a.pdf
Looks interesting!
Stephen
Neat. A bit much to put in a pedal, but there seems to be plenty of current for a pedalboard negative supply, and variable Vo might be useful to compensate for the effect of all the filtering it seems to need :) .
Thanks
Ben
Of course you can put it a pedal, it measures no more than 4 NJM4558s long by 2 wide.
Stephen
Did you look at the price ?
BTW, there a many different negative voltage converters availible. This one has nothing special.
Andrew
Stephen:
I didn't mean just the chip by itself, but with the filtering it apparently needs in any ripple-sensitive environment.
Ben
Here are some pictures of the beast alongside a dual opamp - ssm2135.
(http://img.photobucket.com/albums/v517/uncle_boko/PTN78060_top.jpg)
(http://img.photobucket.com/albums/v517/uncle_boko/PTN78060_bottom.jpg)
There are quite a few minature components squeezed on that double sided board!!
Stephen
it's got a coil on the pcb.
this will generate more EMF that the switchedcap types.
(EMF--ElectroMagneticField)
the switchedcap units(7660) are charge-pump types, use no
inductors, &, 4 the most part, have no EMF.
shields up Scotte
stayshielded
tone
Without testing we'll never know, but I don't think the coil is necessarily going to be a problem. It's small, it's presumeably efficient, and the frequency is bound to be WAY past audio. A switched cap with a poorly thought out grounding scheme could be way worse.