International Rectifier, IR ® (NYSE:IRF), a world leader in power management technology, today introduced the first in a series of high current, ultra-low dropout (ULDO) RAD-Hard™ hybrid linear voltage regulators for space applications including satellites and launch vehicles.

The space level screened devices, designed for point-of-load and post DC-DC power conversion, offer a low dropout voltage of only 0.4 V at full 3 A load. The new regulators feature a Silicon On Insulator (SOI) CMOS Regulator IC, latch-up and SEU immunity, as well as outstanding TID and ELDRS testing in excess of 100 Krad with negligible effect on regulation tolerance. In addition, the devices provide fast transient response, timed latch-off over-current protection and internal thermal protection, and on/off control via shutdown pin.

“Leveraging IR’s extensive heritage in the military and space market sectors, IR has developed an innovative control IC and bypass transistor for the new ULDO family, resulting in significant performance improvements over alternative solutions, making them well suited for use in power-restricted applications requiring high density,” said Michael Toland, marketing manager for IR’s HiRel Business Unit.

“In addition to benefiting from shorter lead times, customers receive enhanced support as a result of our comprehensive understanding of the functionality of the components in these products to minimize issues such as gain and phase margin stability,” he added.

The new ULDO devices’ adjustable regulators provide output voltages as low as 0.8 V compatible with the newer FPGA used in space equipment.

Datasheets, TID radiation report and an application note within the datasheet are available on the International Rectifier website at

Availability and Pricing

Pricing ranges from US $600 for the unscreened non-flight model IRUH330125AP to US $1290 for the IRUH330125AK each in 100-unit quantities. Production orders are available immediately. Prices are subject to change. This product is subject to U.S. export control laws and regulations.

About International Rectifier

International Rectifier (NYSE:IRF) is a world leader in power management technology. IR’s analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world’s single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR’s power management benchmarks to power their next generation products. For more information, go to

Patent and Trademark Notice

RAD-Hard™ and IR ® are registered trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders.

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