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Original question:

[FAQ] TLV320AIC3109-Q1: Power Supply Sequencing

TLV320AIC3107: TLV320AIC3107 power sequence issue

Vincent Chiu
Prodigy 160 points
Part Number: TLV320AIC3107

Hi TI Expert

Follow the power sequence comment from below 

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/952744/faq-tlv320aic3109-q1-power-supply-sequencing/3520370?tisearch=e2e-sitesearch&keymatch=tlv320aic3107%252520leakage#3520370

If our design AVDD&DRVDD(3.3V) is powered on before  IOVDD & DVDD (with same 1.8V source) will also cause leakage current?

Regards,

Vincnet

  • 0
    TI__Mastermind 30075 points

    Hi Vincent,

    I don't have data showing a leakage current, but I would say yes that it would cause leakage current. The AIC3107 is very robust and the power sequencing can be quite flexible, so there isn't necessarily any problem or risk of damage with applying AVDD/DRVDD before IOVDD/DVDD. But if through testing you find the leakage is a concern, I would advise following the recommended sequence.

    Best regards,
    Jeff McPherson