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LTC1046CN8 or ICL7660
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Andbro:
Hi,
Which one do you recommend as a regulator between the LTC1046 and the ICL7660?
If I want to put a tantalum capacitor at the input and output, does the ESR value is important ?
Thank
SiliconWizard:
It would pretty much depend on how much current you're going to draw from the output.
The LT1046 has a significantly lower output resistance, meaning you can draw more current for a given voltage drop. OTOH, it has higher supply current and a slightly lower efficiency.
Kleinstein:
The capacitor ESR can matter, as these switched capacitor converters can produce quite some current peaks, especially the lower resistance LTC1046. Filtering can work better with low ESR caps - though some ESR helps to avoid possible resonances if there are more caps in parallel.
mariush:
The LT would be better, but it depends on your needs, if you really need the current the IC can supply.
There's also other pin compatible chips out there, and clones of 7660 ...
Here's over 300 charge pump inverter chips, which can convert 5v to -5v... if you need higher voltages filter further to see only chips that can do more than your input voltage : https://www.digikey.com/short/pd8qp8
Some may not have the same pinout so double check, but all can do 25ma or more. The surface mount ones could in theory be installed on some DIP adapters if needed.
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