SLVSCE9D June 2014 – October 2017 TPS25942A , TPS25942L , TPS25944A , TPS25944L
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
For a successful design, the junction temperature of device must be kept below the absolute-maximum rating during both dynamic (start-up) and steady state conditions. Dynamic power stresses often are an order of magnitude greater than the static stresses, so it is important to determine the right start-up time and in-rush current limit required with system capacitance to avoid thermal shutdown during start-up with and without load.
The ramp-up capacitor C(dVdT) needed is calculated considering the two possible cases: