International Rectifier Introduces Radiation-Hardened, Low-Voltage DC-DC Converters with Built-In EMI Filtering

EL SEGUNDO, Calif. - January 2006 - International Rectifier IR® (NYSE: IRF), a world leader in power management technology, today introduced the LS Series of radiation-hardened (RAD-Hard™) low-voltage, single- and dual-output DC-DC converter modules. The modules, which include an internal MIL-STD-461C CE03-compliant EMI filter, deliver isolated output voltages from 1.5V to 15.0V with typical efficiency ratings up to 83 percent, at least 5 percent more than the closest competing device.

"Supply voltages for FPGA, ASIC and DSP circuits continue to decrease from 3.3 volts to 2.0 volts and lower. Our LS Series converters offer proven and efficient, off-the-shelf solutions that include EMI suppression," said Rick Furtney, vice president of International Rectifier's HiRel Sector Business Unit.

By including the EMI filter, the new modules simplify power management circuits used in satellite applications, including low Earth orbit (LEO), middle Earth orbit (MEO), geostationary Earth orbit (GEO) as well as in scientific missions that have long life requirements of up to 15 years or radiation design requirements of 100Krads. International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.

The low-voltage converters are made with a proven, patented design using discrete pulse width modulation circuitry and known radiation performance components de-rated per MIL-STD-975. The devices are characterized with total ionizing dose (TID) of greater than 100K Rad(Si), and single event effect (SEE) linear energy transfer (LET) of heavy ions greater than 82 MeV.cm2 /mg in accordance with MIL-STD-883.

The fixed-frequency, single-ended forward converters switch at 575kHz. Other features include 18V to 40V input range, magnetically coupled feedback to insure optimum cross-regulation when the loads are unbalanced, adjustable output voltage, and a device weight of less than 85 grams.

Part Number Max. Pout
Max. Iout
LS2801R5S 12 1.5 8.00
LS2802R5S 20 2.5 8.00
LS2803R3S 25 3.3 7.57
LS2805S 30 5.0 6.00
LS2812S 30 12.0 2.50
LS2815S 30 15.0 2.00
LS2805D 30 ±5 4.8
LS2812D 30 ±12 2.3
LS2815D 30 ±15 1.6

Availability and Pricing

Pricing begins at US $6500 each in production-unit quantity. Consult your local sales representative for sample availability and pricing. Stress, thermal and worst case analysis reports for the modules are available upon request. Prices are subject to change. These devices are subject to U.S. export control laws and regulations.