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UCC27211 as Replacement for ISL2111

Alfred Logico
Expert 5060 points
Other Parts Discussed in Thread: UCC27211, UCC27201
 
Good day!
 
I have an inquiry from one of my assigned accounts, Artesyn, looking for a replacement of Intersil’s ISL2111ABZ-T. I did see via ESP that our UCC27211 is the replacement that we can propose against intersil. I just want to confirm with BU if our UCC27211 is a direct replacement?
 
I ask this because we did notice in the block diagram of the Intersil part that there is an additional NOT gate at the outputs of the Under Voltage block. Where our UCC27211 does not have this. Can you help confirm still if this not gate matters? 
Thanks! 
Regards, 
Alfred
 

Bryan.Cabico@artesyn.com

  • 0
    TI__Genius 9130 points

    Alfredo,

    Using the TI.com competitor cross-ref search, it list the following alternatives to ISL2111:

    This shows that the UCC2711 is not actually a direct cross - it's listed as "same functionality & pinout, but not an exact equivalent".

    A direct cross part for ISL2111ABZ would UCC27201DR.

    I will review the UCC27211 to see why it's not listed as a direct cross, and see what's different, and get back to you.

    Thanks,

    Bernard

  • 0
    TI__Intellectual 2910 points

    Alfred,

    Like Bernard mentioned, I am not sure why UCC27211 is not shown by the tool as a direct replacement for the ISL2111. In short, yes, this is a good replacement part. The UCC27211 offers negative voltage robustness at the input pins vs. the UCC27201, as well as a stronger date drive current capability of 4A for better system efficiency. The quiescent current is also much lower with the UCC27211. 

    The additional negation on the Intersil part's datasheet block diagram is not of concern. This simply indicates that the UVLO logic is internally interpreted with opposite logic, but the external functionality is the same.

    I hope this addresses your concerns.

    Regards,

    - Daniel