LM4050-N-Q1: Reg: Need to know the LM4050AE-2.5 SPICE model is designed to verify the Reverse Breakdown Voltage Tolerance

ATHIESHKUMAR T

Part Number: LM4050-N-Q1

Hi,

I am using LM2050AEM3-2.5 for my application, Hence I want to simulate the behavior of Reverse Breakdown Voltage(±15mV) Tolerance for an Extended temperature range with the test circuit mentioned for Startup Characteristics in Simetrix Environment. But the results -40mV @ 40deg & +51mV @ 105deg which are outside the limits specified in the Datasheet. Check below simulated waveforms for your reference. Also need to to know whether the spice model is designed to simulate the temperature variations or not?. If you not please provide me the specified spice model for Temperature change.

Thanks & Regards

Athieshkumar T

over 4 years ago

0 Marcoo Z over 4 years ago

TI__Mastermind 19550 points

Hi Athieshkumar,

That is unexpected. I have to look into this with who created the model and see what our options are.

0 Marcoo Z over 4 years ago in reply to Marcoo Z

TI__Mastermind 19550 points

Hi Athieshkumar,

I looked into the model and the temperature behavior is modeled edit: not modeled. So that is why the temperature is not accurate. Only parameters at 25C are correct. This model is interesting because you can set the TOL parameter from -1 to 1 to see differences in tolerances at 25C.

0 ATHIESHKUMAR T over 4 years ago in reply to Marcoo Z

Intellectual 390 points

Hi Marcoo,

You have mentioned that SPICE model is modeled for Temperature behavior. But why the results are deviating with respect to Temperature. I can verify the results at 25deg as per your suggestion.

Thanks & Regards

Athieshkumar T

0 Marcoo Z over 4 years ago in reply to ATHIESHKUMAR T

TI__Mastermind 19550 points

Hi Athieshkumar,

I edited my reply. It is not modeled. Temperature is not modeled so the results will vary from 25C inaccurately.

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LM4050-N-Q1: Reg: Need to know the LM4050AE-2.5 SPICE model is designed to verify the Reverse Breakdown Voltage Tolerance