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TPS62230: Adjusting output voltage

Intellectual 760 points

Replies: 2

Views: 438

Part Number: TPS62230

I'm looking at TPS62230 to potentially replace a 1.35V LDO.  I saw that the internals look like a typical DCDC, so I experimented with modifying the feedback node with a resistor divider to achieve 1.35V.  It looks to work and doesn’t show any dynamic load issues in simulation.

 My only question:

Is this an acceptable way to modify the part?  Does it have any limitations that would prevent this circuit from working effectively?  I didn’t see anything in the D/S referring to this capability.

 

 slvm194.TSC

 

  • Hi Aaron,

    This FAQ should answer your question: e2e.ti.com/.../tps6223x-external-resistor-divider

    1.35V is sometimes used to power DDR memory. It is then a fixed value. Do you expect needing to change it in your application?

    Chris Glaser

    Texas Instruments

    ________________________________

    TPSM82810 - new, 6Vin, 4A, high efficiency power module with clock synchronization Now sampling!

  • In reply to Chris Glaser:

    Chris,

    Do not expect this to change, however I don't see a small 1.35V power solution for 300ma loads from a lithium battery.

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