Renesas radiation hardened plastic switching regulators

The four devices include the ISL71001SLHM/SEHM point of load (POL) buck regulator, ISL71610SLHM and ISL71710SLHM digital isolators, and the ISL73033SLHM 100V GaN FET and integrated low-side driver. Combining rad-hard assurance levels with the board area savings and cost advantages of plastic packaging, the new portfolio brings space-grade solutions to missions in medium/geosynchronous Earth orbit (MEO/GEO) with longer lifetime requirements, as well as small satellites (smallsats) and higher density electronics, while reducing size, weight, and power (SWaP) costs.

Traditionally, radiation-hardened ICs were almost exclusively produced using hermetically sealed ceramic packages, which achieved the required reliability but had significant tradeoffs in terms of size and weight. The new Renesas rad-hard plastic ICs help customers reduce their electronics footprint and cost without compromising performance.

To ensure the plastic ICs adhere to the highest quality for operation in harsh space environments, the new devices feature QMLV-like production level testing, and all devices will undergo Radiation Lot Acceptance Testing (RLAT).

Key features of ISL73033SLHM low-side driver and 100V GaN FET

• EAR99
• Combines world-class GaN FET driver and GaN FET in a single package to simply gate design and improve efficiency
• Reduces area size by 20 percent compared with an SMD 0.5 rad-hard MOSFET
• V_DS = 100V & IDS = 30A with 7.5mΩ (typ) R_DSON
• Ultra low total gate charge: 14nC (typ)
• Integrated driver features 4.5V regulated gate drive voltage and 3A/2.8A sink/source capability

Key features of ISL71610SLHM and ISL71710SLHM digital isolators

• EAR99
• Giant Magneto Resistive (GMR) isolation technology delivers better radiation tolerance compared with existing space grade optocouplers on the market
• 2.5kV_RMS Isolation
• Up to 100Mbps data rates for the ISL71610SLHM and 150Mbps for the ISL71710SLHM
• 1.3mA quiescent current and low EMI with no carrier or clock noise

Key features of ISL71001SLHM/SEHM buck regulator

• EAR99
• 6A synchronous POL regulator enables high power conversion efficiency in a smaller package
• Highly efficient: 95% peak efficiency
• Fixed 1MHz switching frequency
• Adjustable output voltage

Renesas offers power management products that can be used in multiple power distribution architectures. Customers can add the new rad-hard plastic ICs to their existing architecture with a new package type and production flow. The ISL71610SLHM and ISL71710SLHM ICs can also be combined with Renesas’ rad-hard and rad-tol CAN bus transceiver and RS-422 transceiver product families for use in serial communications systems.