During transient overload conditions, the LT4256-2’s amplifier actively responds by pulling down the GATE pin when the sense voltage exceeds the 55mV/Rsense threshold—this action occurs regardless of the TIMER status.
Once the current drops back below this threshold, the amplifier releases the GATE, allowing it to rise again. If the overload persists, the GATE will regulate to limit the current; if the overload clears, the GATE will fully turn on the MOSFET.
In the case of a sustained overload, the TIMER begins charging. When the TIMER voltage reaches 4.65V, the MOSFET is turned off. For the LT4256-2 variant, the MOSFET will automatically turn back on after a cooldown period. Adding more capacitance on the output or load side can help maintain output voltage during brief overloads.