Intersil addresses high reliability power supply applications

The ISL7884x family is electrically screened to DSCC SMD# 5962-07249 and has been designed for applications such as satellites, down hole drilling and other high reliability power supply applications. The ISL7884xASRH series includes four new radiation hardened controllers that are compatible with industry standard current mode PWM controllers. According to Intersil, all meet 100krad(Si) total dose specifications and have been tested for single event effects with single event latch up, burn out and transient performance up to LET (86.4 MeV/mg/cm². The series offers Class V and Q manufacturing flows for packaged versions, and a Class V flow for die. The new controllers feature a 1A mosfet gate driver, transient response with peak current mode control and current sense propagation delay of 35ns. All versions operate from a 9 to 13.2V input voltage and over the MIL temperature range of -55 to 125^°C ambient. Intersil says that all of the devices feature adjustable switching frequency up to 1MHz and peak current drive capability with 50ns rise and fall times into a 1nF.