MAX660, charge pump, 100mA max current.

[nelson]

I have seen ALOT of threads asking about charge pumps.

Never heard this chip suggested. It has a higher current handling capability.

Better suited for say the Maestro F/S+H, or other current hungry circuits demanding higher voltages.

It also has the benefit of selectable frequency from 10khz to 80Khz,  like the MAX1044.


http://cache.national.com/ds/MA/MAX660.pdf

Is there a reason this chip hasnt been suggested before?



Woops, looking at the datasheet it has a max supply voltage of 5.5v.....

[PharaohAmps]

I've used this chip with a 9V supply before - once in an MXR Flanger whose transformer failed, and a few other things.  The MAX1044 works great for low current circuits, like my Magnolia overdrive pedal, but for anything more than 1 or 2 op-amps, I like the MAX660.

I'll email my guy over at Maxim / Dallas and ask about the input supply voltage.  Maybe they CAN take 9V...

Matt Farrow

[markusw]

Check out the LT1054.

Markus

[nelson]

http://focus.ti.com/lit/ds/symlink/lt1054.pdf

Yep, looks like a great charge pump, needs an additional cap from cap+ to OSC in order to increase oscilator frequency out of audio range. Is cheaper, has higher current handling and a regulated output!

Will def be using this chip!

Thanks Markusw

[Paul Perry (Frostwave)]

Another vote for LT1054!
By the way, jim williams at linear technology recenty said that these days, analog design skills are so rare, that instead of answering questions about LT chips, he's having to actually design the boards for customers. Don't all ask him at once, though, I think you only get him to design stuff if you are buying at least 50K + of chips.

[nelson]

Got to love free samples

[bluesdevil]

http://focus.ti.com/lit/ds/symlink/lt1054.pdf

Yep, looks like a great charge pump, needs an additional cap from cap+ to OSC in order to increase oscilator frequency out of audio range. Is cheaper, has higher current handling and a regulated output!

Will def be using this chip!

Thanks Markusw

Nelson, if possible what exactly would I need to do to  use the LT1054 in this circuit:
http://aronnelson.com/gallery/TheBigMan-Layouts/voltagedoubler
I would like to use it for the 18v  PT-80 build . Thanks .

[nelson]

Wouldnt bother with that layout. Design a new one based on this schematic.

[bluesdevil]

Thank you!!!!