Los Angeles, California (September 24, 2013) – AEi Systems, the world leader in worst case circuit analysis (WCCA) and SPICE modeling, has released a SPICE model for the RH1959, Linear Technology Corporation’s rad-hard version of the popular 4.5A 500kHz Step-Down Switching Regulator.

The Linear Technology RHxxxx models are available without charge on AEi Systems’ web site (http://www.aeng.com/lt-models.htm). AEi Systems and Linear Technology continue to offer customers and partner organizations (including M.S. Kennedy and Aeroflex) assistance for circuit design and analysis with respect to use of Linear’s radiation-hardened (RH) products in space and other radiation-hardened applications under a special 2011 teaming arrangement (http://www.aeng.com/press/press-10.htm)between the two companies.

Models Enable Switching Regulator Design, and AEI Systems’ Supports Accurate Step Load Regulation WCCA using PDN Assessment

The newly-released RH1959 model is a state-space average model capable of performing both transient (step load) and frequency domain (stability, PSRR) simulations, and is correlated to the performance of the EVM for M.S. Kennedy’s MSK5059RH radiation-hardened adjustable output voltage switching regulator. As a free service, AEi Systems will make the correlation data available to enquiring engineers.

Currently the RH1959 is utilized by the following MSK products:


Typical applications include point-of-load regulators, Microprocessor/FPGA power sources and high-efficiency low-voltage power subsystems. The products are an improved replacement for the Satcon SAT8565, with adjustable output voltage from 1.21 to 5V and radiation hardness to 100kRADs. The parts are also fully Single Event Transient tested.

Get the RH1959 SPICE Model!

About Linear Technology

Linear Technology Corporation (NASDAQ: LLTC), a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, and µModule® subsystems. For more information, visit www.linear.com.

About AEi Systems

AEi Systems is the world leader in worst case, failure and reliability analysis; SPICE modeling; and power systems analysis and design. AEi Systems has a hard-earned reputation for delivering its products and services on time, under budget, and to customer specifications, and serves nearly every significant IC and aerospace manufacturer and many of their customers.

AEi Systems’ headquarters are in Los Angeles, California. For more information, please contact AEi Systems at (310) 216-1144 or visit AEi Systems’ website at www.AENG.com.

About MS Kennedy

MS Kennedy (MSK) has been a Class K MIL-PRF-38534 certified supplier since 1997. MSK is a major supplier of both custom and standard microelectronic rad-hard components to the military and space industry. MSK has designed and manufactured thousands of rad-hard, complex custom hybrid microcircuits that are currently on orbit in both commercial and military satellites, as well as a variety of planetary exploration vehicles.