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need technical help

sonal chirme22
Prodigy 130 points

Hi,

I am using texas TPS76850-Q1 for current requirement of 800mA.  

I am getting constant 5v but after some time input voltage getting fluctuated.  upto 4 to 5 V  but still i am getting constant output voltage of 5V.

please see below schematic

do i need to change capacitor values to overcome problem????  

  • 0
    TI__Expert 5675 points
    Hi Sonal,

    What is your input voltage range? For the fluctuated input voltage, what is the range?
    And what is the load of TPS76850-Q1? Is the 800mA load current always exist, no matter how much the output voltage is?

    Best regards,
    Jason Liu