Charge pumps: MAX1044 compatible/replacement for LT1054?

[Bucksears]

I'm looking at a couple of projects that use an LT1054 for voltage doubling (actually bipolar 18v). I've got some 1044's on hand and didn't know if they would be a direct-pin replacment for the L1054. Or, if there might be voltage issues between the two chips; i.e. one might have a better voltage range than the other, one is quieter than the other, etc.

Thanks,
Buck

[Taylor]

The LT1054 has much higher current ability, so things that were designed for that chip may overheat a MAX1044, or the 1044 may just not be able to handle the circuit at all. Which circuits are you talking about specifically?

[MetalGuy]

LT1054 can handle up to 15V. MAX1044 will need to have pins 1 and 8 connected (if used for audio purposes) unlike LT1054.

[Taylor]

Right, MetalGuy alludes to but does not say explicitly that the MAX1044 can only handle 10v, which can be a problem if you're using an unregulated "9v" supply which puts out 12v or so.

[trixdropd]

Would the lt1054 drop into the geofex a/b/y with no problem?

[Bucksears]

Thanks, guys - guess I'll look into the LT1054, then.