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TLV1117: why TLV1117 is not stable with ceramic output cap, but TLV1117LV is stable with ceramic output cap?

Howard Zou
Genius 12365 points
Part Number: TLV1117

Hi,

1. why TLV1117 is not stable with ceramic output cap, but TLV1117LV is stable with ceramic output cap?

2. Do we have plan to release TLV1117 stable with 0-ESR output ceramic cap? Are there any trade-off/cost to make LDO stable with 0-ESR output ceramic cap?

  • 0
    TI__Guru 55940 points
    Hi Howard,

    TLV1117 and TLV1117LV have different designs and design typologies. While they were designed to target similar applications, the more modern TLV1117LV was designed to be stable with a ceramic output capacitor while TLV1117 requires some ESR. You can use TLV1117 with a ceramic output capacitor if you place a resistor in series with the capacitor to satisfy the ESR requirements.

    We will not release a version of TLV1117 that is ceramic stable; however, we are continuously developing new linear regulators that are ceramic stable. These regulators will have their own family name.

    Very Respectfully,
    Ryan