Models and WCCA Support
AEi Systems and Linear Technology have teamed up to provide you with SPICE models
and Worst Case Circuit Analysis Support for Linear Technology’s entire line
of Rad-Hard products.
You can find a list of the Space Qualified Products here.
AEi Systems Model Listings
Shown below is a list of the Rad-Hard Linear Technology IC models that are now available. Click the link for the model you would like to request.
• RH117 – Adjustable Regulator
• RH1009 - 2.5V Shunt Reference
• RH1021 - 7V/10V Shunt Reference
• RH1084 - 5A Positive Adjustable LDO
• RH1085 - 3A Positive Adjustable LDO
• RH1086 - 1.5A Positive Adjustable LDO
• RH1185 - Neg. Adjustable LDO, Coming Soon, please inquire
• RH1959 - POL, Coming Soon, please inquire
• RH3845 - Switcher, Coming Soon, please inquire
• RH3080 - Adjustable 0.9A LDO
• MSK5800 - Positive Adjustable Linear Regulator
• MSK5810 - Positive Adjustable Linear Regulator
• MSK5820 - Fixed Output LDO (1.5 1.8 1.9 2.5 2.8 3.3 or 5V)*
* Please specify which voltage(s) you would like in the "Comments" field after clicking.
Note: All models are accurate for 25°C and typical performance. Other part characteristics modeled, or not modeled, are documented in the supplied model documentation. Each model is distributed with the PSpice model .LIB file, OrCAD .OLB symbol, sample applications circuit, and correlation data showing the simulation-bench performance comparison.
There are more models to come (RH1959, RH1009, etc.). So, please check back or email us with your RH model request.
Please note: the Linear Technology LTxxxx models supplied with LTspice® software cannot be used for simulation of their Radiation-Hardened counterparts. For example, you cannot simulate an RH1573 with an LT1573. The actual parts are not identical, so many dynamic characteristics of the model (stability, step load, etc.) are not the same.
AEi Systems is pleased to provide basic support for model usage. For questions relating to the OrCAD schematic tool or the PSpice simulator, please contact the provider of those tools, which is generally EMA-EDA or Cadence.
Support for Other Analog Simulation Syntaxes
AEi Systems can provide translations of the models for use with other simulators. Please contact us for pricing and options.
Do You Need Worst Case Analysis?
If you have a circuit using one or more of Linear Technology’s Rad-Hard devices
and need a WCCA or other SDRL (e.g., Stress & Derating, FMECA, radiation analysis)
Please note that you cannot use LTspice models for worst case analyses. A valid worst case analysis requires that you take into account various IC model characteristics with end-of-life effects due to aging and radiation. LTspice models are encrypted, as are the models available for download on this page. Therefore, they cannot be toleranced. You can use the models on this page for nominal analyses. When you are at the point that you need a worst case circuit analysis (WCCA), AEi Systems can perform that analysis for you.
Sample WCCA Reports Available for Review
This WCCA is typical of the analyses required by most space programs and is TOR
These WCCA reports are covered under ITAR regulations. A special license is required for foreign distribution. There is a $500 charge for the license. There is no charge if the recipient is a U.S. Citizen/Green Card holder and resides in the United States or U.S. territories.
It includes the analyses for stability, step load, conducted susceptibility, shutdown threshold, headroom, regulation, short circuit, over-current, and start-up.