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Renesas Electronics Launches Industry’s First Radiation Hardened Single-Chip Synchronous Buck and Low Dropout Regulator for Satellite Power Applications

Renesas Electronics Launches Industry’s First Radiation Hardened Single-Chip Synchronous Buck and Low Dropout Regulator for Satellite Power Applications

TOKYO, Japan ― Renesas Electronics Corporation (TSE:6723), a premier supplier of advanced semiconductor solutions, today announced the industry’s first single-chip synchronous buck and low dropout (LDO) regulator targeting low-power FPGAs, DDR memory and other digital loads for spaceflight payload applications. The ISL70005SEH is the only point-of-load (POL) power solution that reduces size, weight, and power (SWaP) by integrating a synch buck and LDO in one monolithic IC. The device enables satellite manufacturers to reduce bill of materials (BOM) and power supply footprint for their medium Earth orbit (MEO) and geosynchronous Earth orbit (GEO) long duration mission profiles.
The ISL70005SEH rad-hard dual output POL regulator combines 95 percent high efficiency with the synch buck regulator and a low 75mV dropout on the LDO regulator. The device enables easier thermal management for systems with 3.3V or 5V power buses and can support 3A continuous output load current for the buck regulator and ±1A for the LDO. The buck regulator uses a voltage mode control architecture and switches at a resistor adjustable frequency of 100kHz to 1MHz, enabling a smaller filter size.

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