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Regulator dies and takes whole circuit down with him
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KE5FX:
Make sure you have less capacitance downstream of the regulator than you do upstream.
dmills:
Regulator explodes when hot plugged into a LiPo?
Are you by chance using long wires to the battery?

There is a known failure mode associated with ceramic input caps where the inductance of the supply wiring combines with the very low ESR of the input cap to cause the input node to ring up to as much as twice the steady state supply voltage during the startup transient, cure is some ESR for the input cap or a largeish conventional electrolytic across the input ceramic. You only see it when the supply is hot plugged into a stiff power supply.

Regards, Dan.

evansg:
> Are you by chance using long wires to the battery?

Possible, I don't but the customer cases I had probably they do..
I hope an extra electrolytic capacitor at the input will solve this.
Do you think that an ESD suppressor also like SMAJ15A-Q can help?
Thanks!
Zero999:
An ESD suppressor diode is a good idea. You could also try a fuse and over voltage crowbar on the output of the regulator to protect the rest of the circuit, if it fails, but it depends on whether you're going to be doing component level repairs or not. If you're just going to replace the whole board, due to a regulator failure, then you might as well not bother with the crowbar.
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