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LM73606-Q1: Use of this device in Cubesats or LEO

Jessica Kinchin-Harris
Prodigy 10 points
Part Number: LM73606-Q1

I am asking this question on the off chance that there are other satellite designers/users here. My current project is a data processing board for a LEO ESA/UKSA project and I have seen this device being used in a sample PCB picture of a commercial cubesat PCB.

I cannot verify if this is the actual device used so asking? Use of rad tolerant devices is an issue due to cost but I am using a few for critical voltages in a 9 PSU power solution, but looking to provide 6 supplies using these parts.

Thank you

Jessica

  • +1
    TI__Guru 50120 points

    Hello Jessica,

    I'm not sure if this device is specifically used in rad tolerant device. Reason is the "Q1" device are generally used in automotive applications.

    TI does have a space grade portfolio called SEP (Space Enhanced Plastic) that is targeted towards space and high radiation environment.

    The LM73606-Q1 has not gone through the proper testing and qualifications to be considered SEP. 

    https://www.ti.com/lit/sg/slyt532i/slyt532i.pdf

    Regards,

    Jimmy

  • +1 in reply to Jimmy Hua
    Prodigy 10 points

    Thank you Jimmy,

    I am aware that the device is not designed or tested as rad hardened or tolerant, however it is common for CubeSats to be designed using the next best COTS devices, automotive, otherwise the cost becomes too high. A 3U CubeSat is about £200k to launch, and success is to have it working for a few months, so spending £2k per part for space components is not viable. The PCB will be cladded in 2mm Al to reduce rad effects.

    However, it is best to use parts that other users have successfully flown hence my question.