In my project I have two voltage rails with with nominal voltage +48V. (+40V...+60V range)
LTC4421 have a very good functionality, but limited with +45V input voltage.
( I can not understand "60V tolerance" declared at first page of datasheet, because Out max. voltage is 45V)
Is there any application note, ref. design for using LTC4421 at higher voltage available?
There are Application Note 107 "Extending the Input Voltage Range of PowerPath
Circuits for Automotive and Industrial Applications" with circuits using Zener and resistor.
But AN107 describe simple circuits.
I would like to know if such approach work with LTC4421. I think the main issue is connecting UVF, UVR,OV inputs.