• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 63 subscribers
  • Views 151 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

REF3450: Please offer unencypted version of SPICE file

Aidan Walton
Expert 1095 points
Part Number: REF3450
Other Parts Discussed in Thread: TINA-TI,

Hi,

I'm struggling to design with the only reference that meets my requirements which is the LT3450. It would be super helpful if you offer this SPICE file unencypted as I'm forced away from TINA-TI because of other components that I can not easily change.

Please help out if possible.

Thanks

Aidan

  • 0
    TI__Mastermind 19370 points

    Hi Aidan,

    We have the unecrypted version of TINA-TI REF3450 lib file. This file can be usually be imported to PSPICE. If you have issues, tell us.REF3450_AIO.LIB

  • 0
    Expert 1095 points

    If it is not possible to offer the file please can you confirm the following, then I can make a simple SPICE approximation for the device myself.

    I am concerned about overshoot as the reference will be used to drive a tracking regulator. If the reference overshoots significantly and I do not slow down the rise time of the LDO following it I could exceed max voltage spec of other components powered from the tracking LDO.

    The datasheet suggest the output overshoot only occurs if the input supply has a relatively slow slew rate. Does this mean that so long as the supply voltage to the reference has already settled before EN is taken high that I will not see any overshoot?

    Thanks

    Aidan 

  • 0 in reply to Aidan Walton
    Expert 1095 points

    Ah great news, then let me see how I get on with this.

    Much appreciated.

    Aidan

  • 0 in reply to Aidan Walton
    TI__Mastermind 19370 points

    Hi Aidan,

    The pspice model is behavioral and does not model the overshoot at start up.

    The typical allowed range of VIN slew rate is 1V/s to 1V/us. From this testing, the highest overshoot I saw was 2.6V with a CL = 10uF.