TPS51206: Power On sequence

Shuji Ishiwata

Part Number: TPS51206

Hi All,

I have a question about TPS51206.

The sequence in 7.3.6 is as follows.
Turn on VDD, S3, S5-> Turn on VLDOIN and VDDQSNS

The sequence in Figure 23 is as follows.
ON-> ON VLDOIN and VDDQ SNS-> ON S3, S5

I will think both sequences is normal operating.
Which is the reference sequence?

Also, if VDD, VLDOIN, S5, S3 is Off, input 1.5V to VDDQSNS.
Does this condition result in malfunction or failure of the device?

Best Regards,
Ishiwata

0 Weidong Zhu over 5 years ago

Hi Ishiwata-san,

Figure 23 is the recommended power on/off sequence, although both sequence are ok.

It's ok to supply VDDQSNS with 1.5V if VDD, VLDOIN, S5 and S3 are all off.

Regards,

Weidong

0 Shuji Ishiwata over 5 years ago in reply to Weidong Zhu

Hi Weidong-san

Thank you for your reply.
I understand.

Best Regards,
Ishiwata

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