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Part Number: REF3030
My customers use REF3030 (SOT-23-3) to power the MCU (input 3.3V, output 3V):
During the ESD air (6KV) test, when powering the MCU, 3V will drop, causing the power to restart.
They also moved the two CAP C3011, C3000 close to the IC, but not any improved.
If REF3030 is replaced with 431 the ESD test can be pass 20KV and meet the requirements;
Is there any TI can provide help or reference design, or can I find a better ESD Voltage Reference IC?
This is unexpected. The HBM of the REF30 is 4kV so it is less than the 6kV board test. We do not have any device above 4kV.
If you are looking for similar devices to test I would look at the REF3133 and REF3333. These are P2P and different architecture devices.
REF3333 also has a high HBM = 4kV so it is also robust.
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If you are using the TL431, check out the new ATL431LI for improved system performance in a p2p package or a ultra small X2SON (1mm x 1mm x 0.4mm)
Check out: Voltage Reference Design Tips For Data Converters a new app note that discusses voltage reference error and how it affects ADCs/DACs
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