The LTC4365 looks like a great part for my application where I just want a little extra protection against UV/OV/Reverse Polarity blowing up some of our expensive dev boards. Nominal input voltage range is 7.. 9 VDC so I plan to set the windows from 6.75.. 9.25 VDC.
I'd like to have a red LED light up when FAULT (I'll refer to as nFAULT from now on) is asserted, and was going to use a little external constant current IC to drive the LED, maybe the NCR401U. Rather than add a separate switch / part, I'd like to connect its GND right to the nFAULT pin so it lights up when nFAULT is asserted.
I scanned the datasheet, and I see a spec for leakage current, but not a sink current spec. I see a -1 mA sink spec for UV/OV/nSHDN, but not for nFAULT.
Could someone confirm what sink current is allowed on nFAULT? I would likely do something between 5 and 10 mA.
Edit Notes
added part number to subject[edited by: movax at 8:38 PM (GMT -5) on 10 Dec 2025]
