LM4040-N: LM4040BIM3-2.5/NOPB Output Voltage Tolerance question

Jimmy Huang22

Expert 1470 points

Part Number: LM4040-N

Hi Ti team,

We test LM4040BIM3-2.5 Output Voltage Tolerance outside 0.2% in Ta=20°C to 23°C, test output Vref is 2.51V or 2.513V

SCH as below,

Could you pls help us check that does IC failed or below SCH design probem or test method problem? thanks!

over 5 years ago

0 Marshall_Beck over 5 years ago

TI__Mastermind 29080 points

Hi,

How are you making this measurement? What is the resolution of the test equipment that this measurement is being taken on?

0 Jimmy Huang22 over 5 years ago in reply to Marshall_Beck

Expert 1470 points

Hi Marshall，

Test Picture as below. So,Could you pls help us check that LM4040BIM3-2.5 Ir in 60uA to 15mA,Ta=25 can meet 0.2% Max? or only in Ir=100uA Ta=25 can meet 0.2%.

thanks!

0 Jimmy Huang22 over 5 years ago in reply to Jimmy Huang22

Expert 1470 points

Hi Marshall,

End-customer find this problem in product, then do A-B-A test,the problem follow IC.thanks!

0 Marshall_Beck over 5 years ago in reply to Jimmy Huang22

TI__Mastermind 29080 points

Hi Jimmy,

We can only guarantee the device output tolerance for the test conditions specified in the datasheet, as that was how the part was validated over a large sample size.

If you would like to do self-validation, could you replicate the test conditions in the datasheet for the specification you are trying to verify? If you are not matching what the datasheet shows, I will work with you to figure out why.

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LM4040-N: LM4040BIM3-2.5/NOPB Output Voltage Tolerance question