using the tps6102x with ceramic output caps n.
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Using the TPS6102x with Ceramic Output Caps - PowerPoint PPT Presentation


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Using the TPS6102x with Ceramic Output Caps. Datasheet Requires ESR above 30 mOhm. Test Results. TPS61020EVM-025 evaluated with a DC load and with a load transient Evaluated with both recommended output capacitors and non-recommend output ceramic capacitors

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Presentation Transcript
test results
Test Results
  • TPS61020EVM-025 evaluated with a DC load and with a load transient
  • Evaluated with both recommended output capacitors and non-recommend output ceramic capacitors
  • Test conditions: 2.5V in, 3.3V out, DC load 500 mA, transient load 200 mA to 500 mA
  • Slides 4-7 are the standard EVM circuit with the proper output capacitor, while slides 8-12 use only ceramic
conclusion
Conclusion
  • TPS6102x is unstable with ceramic output capacitors, which have low ESR
    • Shows low frequency oscillation/ripple
    • Performance is normal when output capacitors with sufficient ESR are used
  • If ceramic output capacitors are required:
    • Use the newer, smaller TPS61200
    • Use ceramic output capacitors with a discrete 30 mOhm resistors in series to give them the needed ESR