Hello Team,
My customer is asking why we have TLV/LMV/TL431 series shunt regulator, we can find similar performance 431 with different prefix. What's different between those series shunt regulator? How customer select a proper solution for his application?
Thanks a lot.
Vincent Chen
Hello Vincent,
Let me try to help give a brief overview of the differences for your information.
The TL431 is the original standard shunt voltage reference.
The TLV431 is a lower voltage reference option of the TLV but also has some different specifications.
The TLVH431 is an option of the TLV431 with a higher tolerance at the cathode pin for voltage.
The LMV431 is what device was developed by the previous National Semiconductor team and is a functional equivalent to the TLV431, although the LMV431 has a higher tolerance at the cathode for high voltage. The same is true for the LM431 vs TL431, these are direct functional equivalents.
To select the right device it really depends on the following key specifications:
Reference Voltage - 2.5V or 1.24V
Minimum Cathode current to regulate (Ik(min)) - A lower value means lower power consumption, so if power consumption is key, then i would recommend the ATL431 as the lowest cathode current to regulate
Maximum cathode voltage - if high voltage is possible, TL431/LM431 is recommended
Here is a chart to highlight the primary differences. I hope this helps. Please let me know if you have additional questions.
Best,
Michael
