International Rectifier Unveils Radiation-Hardened MOSFETS

International Rectifier (IR), a provider of power management technology solutions, has introduced a range of hermetic radiation hardened (RAD-hard) 100 V MOSFETs. The new devices have been made available in a compact, surface mount SMD0.2 package and will be helpful for deployment in space applications such as satellite bus power systems and payload power supplies.

The new hermetic, compact SMD0.2 package by IR leverages Aluminum Nitride ceramic, and offers better thermal conductivity. With its reduced weight and system size, the package fulfills the requirements of power designers and has been developed for packaging RAD-Hard MOSFETs. The SMD0.2 surface mount package features a small footprint with 8mm x 5mm x 3mm dimensions, and weighs only 0.25 g. When compared to previously existing SMD0.5 packages, the new SMD0.2 surface mount package is half the size, and consumes the same amount of power at around 23 W.

“This new family of devices combines IR’s heritage in RAD-Hard MOSFET technology with innovative patented packaging technology to help engineers meet the challenges of designing space applications that demand increasingly smaller, lighter, highly reliable system solutions," said Odile Ronat, discrete marketing manager for the HiRel Business Unit at International Rectifier.

The company has deployed its RAD-Hard MOSFET technology within the new MOSFETs, which are available in both 100 krad and 300 krad total dose rating and SEE rating of 85MeV/(mg/cm2). Additionally, it has also been providing standard and logic level N-channel and P-channel devices; and the voltage variants except 100 V on request as well. Initially, the company has been providing the IRHNM57110 and IRHNM597110 MOSFETs for a price of $371 in 100 unit quantities, while the IRHLNM77110 is available for $465 in 100 unit quantities.

In October 2010, International Rectifier introduced its SBB Series of non-isolated, radiation hardened point-of-load voltage regulators. The new 30 W radiation hardened POL regulators had been designed to maximize efficiency in space applications that require high output current and low supply voltage such a satellites requiring long mission life up to 15 years or 100Krads of total ionizing dose.