SLVK226 October 2025 TPS7H4012-SEP
The purpose of this study was to characterize the effect of heavy-ion irradiation on the single-event effect (SEE) performance of the TPS7H401x-SEP synchronous buck converter. Heavy-ions with LETEFF = 48 MeV×cm2/mg were used for the SEE characterization campaign. Flux of ≈105 ions/cm2/s and fluences of ≈107 ions/cm2 per run were used for the characterization. The SEE results demonstrated that the TPS7H401x-SEP is free of destructive SEL and SEB and SEFI free up to LETEFF = 48 MeV×cm2/mg across the full electrical specifications. SETs are characterized and discussed at LETEFF = 48 MeV×cm2/mg. CREME96-based worst-week event-rate calculations for LEO(ISS) and GEO orbits for the DSEE and VIN=12V SET cases are presented for reference.