TUSB1210: Power-down sequence

Kazuki Itoh

Part Number: TUSB1210

Hi team,

In TUSB1210 datasheet, the power up sequence is specified in Figure 6-1.
But from my understanding, the power up sequence is not mandatory as the internal leakage should not be significant as discussed in the thread below.

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/508723/tusb1210-q1-power-sequencing

How about power down sequencing?
Does the power down sequence have anything to care about?

Regards,
Itoh

11 months ago

0 Kazuki Itoh 11 months ago

TI__Genius 9435 points

Hi team,

Could you assign apps engineer to address this request?

Regards,

Itoh

+1 Brian Zhou 11 months ago in reply to Kazuki Itoh

TI__Guru** 112740 points

Iton:

for power down, VDDIO dhow be off first then, VBAT off later.

Sorry, TI e2e was for Maintenace since Last thursday.

Best

Brian

0 Kazuki Itoh 11 months ago in reply to Brian Zhou

TI__Genius 9435 points

Hi Gerardo-san,

Thanks. Is powering down VDDIO mandatory?
Or, is it just internal leakage reason which is negligible in the end?
If the power down sequence is mandatory, could you please let me know the specific timing requirement?
(Please let me know specific power up timing requirement as well if it's mandatory)

Regards,
Itoh

+1 Brian Zhou 11 months ago in reply to Kazuki Itoh

TI__Guru** 112740 points

Itoh:

it's just leakage reason.

Best

Brian

0 Kazuki Itoh 10 months ago in reply to Brian Zhou

TI__Genius 9435 points

Hi Brian-san,

I understand that VBAT and VDDIO power-up and down sequences are not mandatory as long as the leakage is acceptable.

Regards,

Itoh

Interface

Interface forum

TUSB1210: Power-down sequence