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selecting a ultra low noise and ultra high PSRR adjustable VOUT (0.8V to 1.4V+) LDO with 1.5A output current and <0.5V dropout

waqar hyder
Intellectual 480 points
Other Parts Discussed in Thread: TPS7A8300, TPS7A7100, TPS7A7300, TPS7A7200

Hi

we  had been using the TPS7A8001 for our designs but that one only goes to 1A, I have been trying to find something similar with similar or better noise and pssr specs but with 1.5A or higher current, but no luck so far.

any suggestions ?

  • 0
    TI__Guru 55940 points
    Hi ,

    TPS7A8300 is a 2A LDO that may work for your application. Please let me know if you have any questions about the device.

    Very Respectfully,
    Ryan
  • 0 in reply to Ryan Eslinger
    Intellectual 480 points

    HI

    Thx for he answer. Is that the only choice for >1.5A current? Is there a way to use the internal resistor divider resistors of TPSA8300 with an external resistor/s to improve the adjustable output voltage resolution to say 10mV or finer, the default settings just gives 50mV of adjustability.

    Also, is there any recommendation on choosing the resistor value ranges to reduce parasitics/noise. Usually one of the resistors has a fixed recommendation and the other will be adjusted to get the desired range.

    Also is there another part without the 5 programmable voltage pins in a smaller package with very good PSRR and noise specs ? 

  • 0 in reply to waqar hyder
    TI__Guru 55940 points

    Hi ,

    There are additional devices that can support a 1.5A load.  You can find these using the parametric search here:

     

    Additionally this Blog shares information on increasing resolution using the ANY-OUT pins: 

    How to increase resolution in ANY-OUT programmable output voltage devices
    With an adjustable LDO, you could create any output voltage. However, this is not the case with ANY-OUT programmable output voltage devices such as the TPS7A8300 , the TPS7A7100 , TPS7A7200 and TPS7A7300…
    By in Technical articles > Power management

    Very Respectfully,

    Ryan