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LM385-ADJ model problems
Part Number: LM385-ADJ
Dear TI Staff
I downloaded LM385-ADJ spice model from your website, I simulate on LTspice and follow the circuit as I attached. I found that it is not working. But when I swap R2 and R3 the result is correct.
Which one I should trust between datasheet or this spice model? If the spice model is wrong could you provide the correct one?
Datasheet link -->http://www.ti.com/lit/gpn/lm385-adj--
Spice model link -->www.ti.com/.../snvmb82<--
Circuit picture below
The datasheet should be correct. I have ordered some devices of this flavor because I do not have them currently. I can try this
Is there a reason you want to use a LM385 vs a LM4041-ADJ or ATL431LI? I can confirm that both of those devices datasheet and models match.
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If you are using the TL431, check out the new TL431LI and its low Iq counterpart ATL431LI for improved system performance in a p2p package.
Check out: Designing with the improved TL431LI for how to calculate worst case error on all '431 devices.
Check out: Designing with the ATL431LI in Flyback Converters for tips and tricks on how to lower standby Iq to meet DoE and CoC regulations.
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In reply to Marcoo Z:
Thank you for your following about my issue.
I got this design from the last project of my company, then I use this circuit to be a reference for my current project.
I will look forward to your checking.
In reply to Narukom Sakoonvilaikidcharoen1:
I requested samples of the LM385. They have arrived and I will verify the datasheet these coming days.
The device matched the datasheet. I need to look at why the spice model did not function the same way.
I will feel confident using the device schematic that you have posted.
Thank you for your help, so I can move forward with my project.
Also could I have this spice model of LM385 after you have the correct one?
In reply to Narukom Sakoonvilaikidcharoen:
I agree that the model is not working properly. I can look into correcting the model or removing the non functional model. A fixed revision will take a while so I would not count on it in the next coming month.
If you don't need the low Iq of the LM385, you can use a LM4041-N ADJ or TL431LI and those have both working models and a variety of package options.
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