SLVS503F November 2003 – February 2020 TPS2490 , TPS2491
PRODUCTION DATA.
In general, the TPS2490 behavior is more reliable if it is supplied from a very regulated power supply. However, high-frequency transients on a backplane are not uncommon due to adjacent card insertions or faults. If this is expected in the end system, TI recommends placing a 1-µF ceramic capacitor to ground close to the drain of the hot swap MOSFET. This reduces the common mode voltage seen by VCC and SENSE. Additional filtering may be necessary to avoid nuisance trips.