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TPSM84624: TPSM84624

ghasem aghdam
Intellectual 455 points
Part Number: TPSM84624

Hi there,

Last paragraph on Page 15 of the TPSM84624 datasheet says that "If using a combination of ceramic and polymer type of output capacitance, only a single polymer capacitor can be used.".

For me, it doesn’t sound too practical in real applications, since output capacitors in almost all applications are comprised of ceramic and Polymer or Tantulum or Os-CON or both. What do you think?

Thanks & BR,

Ghasem

  • 0
    TI__Guru 50120 points

    Hi Ghasem,

    The reason for this may be because it is recommended to have low ESR output capacitance for optimized transient performance. Generally the output capacitance is comprised of one large bulk polymer capacitor in parallel with multiple ceramic caps. Also large output capacitors with high ESL and ESR may impact the stability of the regulator. Limiting this to a single polymer capacitor helps with mitigating issues of potential instability and undesired transient performance.

    Regards,

    Jimmy