TPS6594-Q1: questions about PDN-0B

Shubiao Wang

Part Number: TPS6594-Q1

Hi Chris,

as we talked with Lijia before, https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1029631/tps6594-q1-two-questions-about-pdn-0b/3806647#3806647

i want to double check that the table 3-1 of SLVUC32 app note. VDD_IO_3V3 is NOT required in MCU-only mode. instead, the VDD_MCUIO_1V8 should be required,, right?

BRs,

Shubiao

over 3 years ago

0 Alex Saenz over 3 years ago

TI__Expert 6700 points

Hi Shubiao,

This ticket has been assigned to the appropriate engineer who should be getting back to you in the next day or so.

Regards,

Alex

0 Michael Gambrill over 3 years ago

TI__Mastermind 25725 points

Hello Shubiao,

The PDN-0B user guide was recently updated and table 3-1 changed.

https://www.ti.com/lit/pdf/slvuc32

0 Shubiao Wang over 3 years ago in reply to Michael Gambrill

TI__Intellectual 1490 points

Hi Michael,

Why the VDDSHV0-4,VDDSHV6 (3.3 V) is required?

1. From the figure 3-1, we can find VDDSHV0-4,VDDSHV6 (3.3 V) powers main digital and system .

2. the figure 6-9, figure 6-10, when the PMIC goes to MCU only status, the enable signal is also low.

so i believe the this power net is not required,

0 Alex Saenz over 3 years ago in reply to Shubiao Wang

TI__Expert 6700 points

Hello Shubiao,

Michael should be able to respond to this in the next day or so. Thank you.

Regards,

Alex

0 Shubiao Wang over 3 years ago in reply to Alex Saenz

TI__Intellectual 1490 points

Hi Michael, Alex,

Please help to update the question, thanks a lot.

BRs,

Shubiao

0 Michael Gambrill over 3 years ago in reply to Shubiao Wang

TI__Mastermind 25725 points

Hello Shubiao,

I believe you are correct and have found a typo in figure 3-1., VDD_IO_3V3 is not required for MCU only mode. Figures 6-9 and 6-10 are correct.

We will update the user guide for PDN-0B as soon as possible.

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TPS6594-Q1: questions about PDN-0B