Infineon Applied sciences AG claims the trade’s first radiation-hardened (rad-hard) buck controller with an built-in gate drive. The RIC70847 buck controller targets point-of-load energy rails in industrial house programs and different excessive environments. Functions embody distributed satellite tv for pc energy programs and digital processing payloads, together with FPGA and ASIC programs.
The RIC70847 contains a 17.1-V buck controller with a 5-V (output) half-bridge gate drive, suited to purposes with an influence enter vary of 4.75 V to fifteen V and energy output vary of 0.6 V to five.25 V. The system meets the MIL spec temperature vary of -55°C to 125°C and purposes that require a complete ionizing dose ranking of as much as 100 krad (Si) and single occasion results characterised as much as a linear vitality switch of 81.9 MeV·cm²/mg.
The rad-hard buck controller incorporates load line regulation and fixed-frequency peak present mode management, which is reported to ship distinctive transient response whereas lowering the variety of output capacitors required. As well as, the excessive step-down voltage ratios, mixed with the 5-V half-bridge gate driver, simplify the design course of and decrease part depend for a extra compact and environment friendly energy administration design.
The excessive stage of integration additionally improves system reliability and reduces the chance of part failure, Infineon mentioned.
The RIC70847 buck controller is housed in a hermetically-sealed 24-lead flatpack or die type, and works seamlessly with logic-level transistors, comparable to Infineon’s rad-hard R8 energy FET. It’s out there now, together with the RIC70847EVAL1 DC/DC buck controller analysis board. The eval board options an built-in dynamic load step circuit for transient testing and helps a spread of output capacitance and inductor configurations.
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