MAX1044 max voltage: paranoia?

[moro]

The data sheet says it runs at 25 kHz without an additional cap. With a cap of 5-20 pF you can increase the frequency.

Cool. Thanks!

I simulated it once in LTSpice to check the oscillator freq with external caps. Will check when I'm back home. If you have access to a scope or freq counter you could adjust the freq to 30-40 kHz .

Yeah, sounds like it should be ok. Unless you're a bat.

[markusw]

According to the sims 4.7p would give you close to 40 kHz which clearly would be in the bat range. 
(7p should give slightly above 50 kHz, 10p close to 100 kHz).
With 4.7-7p you also shouldn't loose too much voltage at higher loads (see data sheet).

Good luck! 

Markus

[moro]

According to the sims 4.7p would give you close to 40 kHz which clearly would be in the bat range. 
(7p should give slightly above 50 kHz, 10p close to 100 kHz).
With 4.7-7p you also shouldn't loose too much voltage at higher loads (see data sheet).

This is great info. Thanks! (Apparently, one of the skills I need to work in is reading a data sheet.)

[markusw]

Hope the sims are correct. Since it's a simulation model by Linear and I'm using their software I'm pretty confident that clock frequencies should be very close to reality.
Please, let us know how it turns out 

Markus

[stm]

I bet this trick of adding a small cap between pins 2 & 7 would work equally well to raise frequency of the ICL7660 and similar devices that have no pin 1 boost capability, in order to run them above 10 kHz.