RIC70847 is a radiation hardened (rad hard) synchronous buck controller with an integrated gate driver designed for harsh radiation environments and space applications. The device offers reliable performance with electrical parameters qualified to DLA QML-V screening level MIL-PRF-38535. An engineering model and evaluation board are available. The integrated half bridge gate driver has a 5 V drive voltage and is designed to work with external logic level transistors, such as Infineon IR HiRel’s rad hard R8 power FETs. Unlike existing solutions, RIC70847’s external FET architecture establishes flexibility for varying design requirements, whether prioritizing light load efficiency, full load efficiency, or minimizing board area. RIC70847 supports a wide input voltage range including nominal inputs of 5 V and 12 V, and its output voltage can support low voltages from 0.6 V to 5 V. This makes RIC70847 ideal for point-of-load (PoL) applications such as core rails of space rated FPGAs and ASICs, including devices such as AMD’s Versal XQRVE2302 and XQRVC1902. A key feature of RIC70847 is load-line regulation, also referred to as AVP or droop regulation. The device dynamically adjusts the output voltage based on the power demand of the load, providing system benefits such as low power dissipation and reduced output capacitance. Paired with peak current mode control, tight reference accuracy, and external FETs, RIC70847 allows for a small and flexible system solution. The device features multiple integrated fault protections for increased reliability: undervoltage lockout (UVLO), VIN overvoltage (OVP), VDRV undervoltage lockout (VDRV UVLO), output voltage overvoltage (VOUT OVP), overcurrent protection (OCP), overtemperature protection (OTP), and loss of SYNCI signal. These features ensure the RIC70847 maintains proper synchronization and reliable performance under demanding conditions. PRODUCT BRIEF RIC70847 Rad hard buck controller with integrated gate driver ‒ Wide supply range (5 V and 12 V nominal) ‒ Wide load output range (0.6 V to 5.25 V nominal) ‒ Integrated 5 V half bridge gate driver ‒ Radiation lot acceptance tested ‒ TID of 100 krad(Si) ‒ No destructive SEE up to LET of 81.8 MeV·cm2/mg ‒ Mil temp qualified -55°C to 125°C ‒ Hermetically sealed 24-lead flatpack or die form ‒ DLA qualified to MIL-PRF-38535 Key features ‒ PoL converter for space grade FPGA, ASIC, and DSP core rails ‒ Digital processing payload systems ‒ Distributed satellite power systems Target Applications www.infineon.com/hirel ‒ Wide voltage range supports multiple system architectures ‒ Tight reference voltage accuracy improves support of the latest FPGA ‒ 5 V drive optimized to work with R8 FET, allowing for efficiency optimization Key Benefits 24-lead flatpack Product Table Orderable part number Package type Device level Total ionizing dose level 5962R2320601VXA 24-lead flatpack Level V1 100 krad(Si) RIC70847F 24-lead flatpack Engineering model2,3 — 1 Per MIL-PRF-38535 2 Intended for engineering evaluation only, devices are only electrically tested at 25°C and for hermeticity 3 “Engineering model” may be referred to as “COTS” (commercial-off-the-shelf) in legacy or related documents PRODUCT BRIEF RIC70847 Rad hard 17 V buck controller with integrated gate driver Evaluation board RIC70847EVAL1 offers evaluation of the RIC70847. Populated with logic level (5 V drive) FETs in rad hard SMD packaging, the evaluation platform enables ease-of-use optimized for testing RIC70847’s capabilities in PoL rails. Typical PoL application www.infineon.com/hirel Published by International Rectifier HiRel Products, Inc. An Infineon Technologies Company El Segundo, California 90245 USA © 2026 Infineon Technologies AG All rights reserved. Public Date: 09/ 2026 Please note! This Docume nt is for information purpose s only and any information give n here in shall in no eve nt be regarde d as a warranty, guarante e ordescription of any functionality, conditions and/or quality of our products or any suitability for a particular purpose. With regard to the technical specifications of our products, we kindly ask you to refer to the relevant product data sheets provided by us. Our customers and their technical departments are require d to evaluate the suitability of our products for the intended application. 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