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TPS7A33: TPS7A33

Vikita B
Prodigy 20 points
Part Number: TPS7A33
Other Parts Discussed in Thread: TPS7A96,

Tool/software:

Hello!

I need assistance in finding Ultra low noise 2A output matched complementary pairs of positive & negative LDOs. Earlier I was using TPS7A4700 and TPS7A3301 (1A output) . However now I require LDOs similar to these but 2A output.

Voltage requirement is - 5.3 V to 4.5V and -5.3V to -4.5V. Kindly suggest.

Thank You.

  • 0
    TI__Mastermind 37065 points

    Hello Vikita,

    I assume your input voltage is +/- 5.3V and you need to generate +/- 4.5V?

    If so, the lowest noise LDO on the market is our TPS7A96 (which is a positive LDO) which can provide 2A with a maximum Vin of +6V.  For the negative LDO you will need to parallel the TPS7A33 to increase the load current up to 2A, which will require 3x TPS7A33's in parallel using the ballast resistor technique.  We have developed comprehensive resources on parallel LDO's using the ballast resistor technique and engineers are paralleling the TPS7A33 currently to increase their load current.  Please see the following resources to help you parallel the LDO:

    Parallel LDO calculator
    https://www.ti.com/tool/PARALLEL-LDO-CALC

    Parallel LDO white papers:
    (These papers are optional but help you to understand the fundamentals behind the ballast resistor technique)
    https://www.ti.com/lit/wp/sbva100/sbva100.pdf

    https://www.ti.com/lit/wp/sbva093/sbva093.pdf

    Thanks,

    Stephen