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Original question:

LMQ61460-Q1: LMQ61460-Q1

LMQ61460-Q1: LMQ61460-Q1

Jean Finders
Prodigy 20 points
Part Number: LMQ61460-Q1

Our schematics is nearly the same as the LMQ61460-Q1 EVM-Modul (with LMQ61460AFSQRJRRQ1). Without load output-voltage is 5.1 Volt. When we increase the load output-voltage dorps. What could be the problem?

  • 0
    TI__Mastermind 47060 points

    Hi,

    1. What is your test condition (VIN,VOUT,IOUT, Tamb)? 
    2. What load current causes output voltage to drop?
    3. What does the voltage drop to (lower voltage or 0V)?
    4. Can you provide waveform of VIN,VOUT,IOUT, and SW? Probe though zoomed out timescale (full system picture) and zoomed in timescale (couple SW cycles).
    5. Is this a single case failure observation or is this on multiple boards?
    6. Have you tried testing this on the actual EVM modified to your application requirements to confirm it is not a PCB layout/ solder issue?

    Regards,

    Jimmy 

  • 0 in reply to Jimmy Hua
    TI__Mastermind 47060 points

    Hi,

    Can you provide an update on the 6 questions I've asked to get a better understanding of your system application?

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Mastermind 47060 points

    Hi,

    I have not heard back from you for some time. As such I will assume you were able to resolve the issue on your end.

    Because of this I will be closing this thread. 

    Thank you for using the E2E forum.

    Regards,

    Jimmy