High-side load switch for automotive power domains
The TPS22918TDBVRQ1 is an automotive-grade (AEC-Q100) single-channel high-side load switch from Texas Instruments, delivering up to 2 A from a 1 V to 5.5 V load supply. Its 52 mOhm typical on-resistance keeps conduction losses low enough that the SOT-23-6 package can handle the current without excessive heating at 85°C ambient.
Rds(on) and thermal budget at 2 A
At 2 A continuous, the 52 mOhm typical Rds(on) dissipates about 208 mW — well within the SOT-23-6's thermal capability at 105°C junction, but board copper area matters. The load discharge feature pulls the output low when the switch is off, preventing floating rails on capacitive loads.