SLUS907K January 2009 – June 2019 TPS2421-1 , TPS2421-2
PRODUCTION DATA.
When a hard overload causes the load current to exceed approximately 1.6 × ILIM the TPS2421 immediately shuts off current to the load without waiting for the fault timer to expire. After such a shutoff the TPS2421 device enters startup mode and attempts to apply power to the load. If the hard overload was caused by a transient, then normal startup can be expected. If the hard overload is caused by a persistent, continuous failure then the TPS2421 device enters into current limit during the restart attempt and either latches off (TPS2421-1) or attempts retry (TPS2421-2).