Max Injection Current for FB pin

Hey, 

To clarify you need to guarantee that the FB input can tolerate a forced current when out is back driven?

Best,

Vahnroy

Correct, using a diode to protect the Vout pin, but the FB pin will see some forced current. It will not exceed the maximum voltage at that pin. Could see up to .3mA backfed to the FB pin though.

Hey,

 the max current through the FB pin is characterized 1µA. Driving 0.3 mA continuously through FB could affect regulation accuracy or long-term device reliability. We do offer other LDO's that can protect against shorts like these, if you would like to explore those options.

Thanks,

Vahnroy

I would appreciate seeing some other options, I didn't expect such a low max value on that pin. This would only be in a fault condition, but we need the part to be able to survive it. I have managed to get it down to 14.6uA.

Hey Joseph,

The part might be able to survive the fault. It's just beyond what we have guaranteed. Check out some of these other options and let me know if they would work, TPS7B701, TPS7B702, TPS7B4255,

Thanks,

Vahnroy