LMK03318:VDDO_x power up delay

Hirabayashi

Part Number: LMK03318

Hi,

I have a question about the power supply sequence for the LMK03318.
As shown below, Is there any problem if there is a delay between power up of VDD_PLL, VDD_LDO, VDD_IN and VDD_DIG and power up of VDD_x ?

over 3 years ago

0 Jennifer Bernal over 3 years ago

TI__Genius 17025 points

Hi,

There should be a delay between those supply groupings when operating under the split power rail condition. Please see 12.4.4 Powering Up From Split-Supply Rails from the datasheet.

1.8 V supply should be applied once the 3.3 V supply reaches 2.72 V.

PDN should be asserted once 1.8 V supply reaches 1.71 V

Regards,

Jennifer

Clock & timing

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LMK03318:VDDO_x power up delay