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TMS320C5517: About the supply power of CVDD

UNA
Mastermind 7980 points
Part Number: TMS320C5517

Hi,

I would like to use C5517 with CVDD supplied 1.3V.
At that time, is it possible to supply common power supply with CVDD and other 1.3V power supply(USB_VDDA1P3, VDDA_ANA, VDDA_PLL)?

Best regards,
H.U

  • 0
    TI__Guru**** 161600 points
    Hi,

    As far as I see in the datasheet, there is no specific power-up requirement for the TMS320C5517 devices, so it should be possible to group the power supplies. However, see Section 5.7.2.1 Power Considerations from the datasheet:
    "To minimize power consumption, the device divides its circuits into nine main isolated supply domains:
    • LDOI (LDOs and Bandgap Power Supply)
    • Analog POR, SAR, and PLL (VDDA_ANA and VDDA_PLL)
    • RTC Core (CVDDRTC) — Note: CVDDRTC must always be powered by an external power source. None of the on-chip LDOs can be used to power CVDDRTC
    • Digital Core (CVDD)
    • USB Core (USB_VDD1P3 and USB_VDDA1P3)
    • USB PHY and USBPLL (USB_VDDOSC, USB_VDDA3P3, and USB_VDDPLL)
    • EMIF I/O (DVDDEMIF)
    • RTC I/O (DVDDRTC)
    • Rest of the I/O (DVDDIO)"

    My suggestion is to follow this recommendation. Divide your circuits into nine main isolated supply domains as listed above.

    Best Regards,
    Yordan