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Question on the LMR70503, negative supply

Yue Zhang
Intellectual 780 points
Other Parts Discussed in Thread: LMR70503

Hello John,

thank you very much for your reply. I have a further question. If you always need a negative voltage to generate a negative voltage, do you know how the LMR70503 (http://www.ti.com/product/lmr70503) works? As far as I understand, there is no negative power supply.

Thanks! 

  • 0
    TI__Mastermind 25825 points

    Hello Yue,

    The LMR70503 is a SIMPLE SWITCHER device.  I will move your post to the appropriate forum so they can provide greater insight into its operation.

     

  • 0 in reply to Pete%20Semig
    TI__Genius 11085 points

    Yue,

    Yes, the LMR70503 is an inverting buck boost converter. It converts positive input voltage (2.8V to 5.5V) to negative output voltage (-0.9V to -5.5V). The peak inductor current is about 350mA.

    What is the input voltage, output voltage and load level in your application? I can help you with the LMR70503.

    regards,

    Yang Zhang - SVA Simple Switcher