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TPS61025: a question about the dynamic response of power supply

chen chen35
Intellectual 875 points
Part Number: TPS61025
Other Parts Discussed in Thread: TPS61021A

Hello, we want to use tps61025 and the input voltage is 1.8V-3.6V , 3.3V voltage output. I need to  confirm if Vin is 1.8V ,the load current change  from 500mA to 1A, how about the dynamic response of power supply ?May the output voltage drop a lot? Thanks 

  • 0
    TI__Mastermind 46905 points
    Hello Chen

    From the input and output condition, I would suggest TPS61021a instead of TPS61025. The performance of TPS61021a is much better than TPS61025.
    About dynamic response of TPS61021A, you can apply an EVM for reference or use its TINA model for simulation.
  • 0 in reply to Jasper Li
    Intellectual 875 points

    Hi Jasper

        Now I get  some  TPS61021A  sample,because I do not have much time to make a PCB, I use some fly line tie  the IC pad to PCB pad. I used digital power supply 1.8V for TPS61021A, when the load current from 500mA to 1A, the voltage droped and my MCU  restart. please give me some suggest for this case,thanks.L1 is 1Uh/2A，R1 is 240K 1%，R2 is 75K 1%，C3 is 47pF，C2 is10uF.

  • 0 in reply to chen chen35
    TI__Mastermind 46905 points
    Hello Chen,

    The layout of a boost converter is critical for normal operation of a boost converter. We can see unexpected behavior if the layout is not good. So I would suggest you do a real PCB or apply an EVM for evaluation.