The AAT4612 SmartSwitch is a current limited Pchannel MOSFET power switch designed for highside load switching applications operating with inputs ranging from 2.4V to 5.5V, making it ideal for both 3V and 5V systems. An integrated current limiting circuit protects the input supply from large currents which could potentially cause the supply to fall out of regulation. In addition, the AAT4612’s thermal overload protection limits power dissipation and junction temperatures associated with prolonged periods of operation in current limit. Due to
its low RDS(ON), the AAT4612 can be used to control loads that require up to 1A even while operating at high ambient temperatures. The ultra-fast currentlimit response to a sudden short circuit is a mere 500ns which reduces the requirements of local supply bypassing. Quiescent current is a low 10μA and, in shutdown mode, the supply current decreases to less than 1μA