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LMZ35003 / Inverting configuration

Other Parts Discussed in Thread: LMZ34002, LMZ35003

Hi Everyone,

Our customer plan to regulate +/- 12V with 1.5A load each from 24V input. I know that The LMZ34002 is appropriate solution for -12V, but now they are considering to use LMZ35003 with inverting configuration. Because they decided to use LMZ35003 for +12V output and so they would like to use the same device both +/-12V. I believe that it can be use with inverting configuration, but now I would like you to advise about layout. And also I'd like to know if LMZ35003 can be used with -12V with 1.5A load from 24V input.

[Question]

  1. Can LMZ35003 be used with -12V with 1.5A load from 24V input?
  2. Please see the attached layout and give your recommendation.

LMZ35003 Inverting configuration.pdf

Best Regards,

Sonoki / Japan Disty

  • Hi Sonoki,

    The Vin in the schematic was marked +12V, which I assumed was a typo.  It should be fine to run at 24Vin and -12Vout at 1.5A, but NOT for 12Vin and -12Vout at 1.5A.

    Moreover, the layouts look fine.  It is also suggested to run at 800kHz for a 24Vin and -12Vout application.  Please also follow the Cin, Cout, and Cio recommendations as stated in LMZ34002 ds.

    Hope this help.

    Thanks,

    Hung

  • Hi Hung,

    Thank you for your comment. Yes, +12V in schematic is typo... The correct Vin is +24V. I'll try to evaluate by using EVM before recommend to customer.

    Best Regards,
    Sonoki