Selective input

has introduced a new protected high-side load switch that can operate under a supply voltage range of 2.4V to 5.5V and handle a continuous output current of 1A, with the threshold current set by a single external resistor.

The SiP4610A/B is designed for applications including load switching, battery switching, USB peripheral ports, and other power management applications in notebook computers, PDAs, MP3 players, and other portable and handheld systems, as well as for hot-swapping in telecom applications.

Vishay says a user-defined current limit level protects the input supply voltage from excessive load currents that might cause a system failure. The SiP4610A/B has a low quiescent current of 9µA, and reduces the supply current to less than 1µA in shutdown mode.

In addition to the current limit, the SiP4610A/B is protected by undervoltage lockout and thermal shutdown features. The over-temperature protection circuit prevents thermal runaway by turning off the power switch when the chip's junction temperature reaches 165 degrees C and leaving it off until the temperature drops below 145 degrees C.