DRV8313 Starting Time for 3.3V Internal Regulator

Sadanori Kato

Other Parts Discussed in Thread: DRV8313

Hi,

How many seconds does the V3P3 voltage which the internal regulator outputs become stable in after applying the VM power supply ?
Could you please give us your advice since we need to control DRV8313 via the GPIO ?

Best regards,
Kato

over 8 years ago

0 Rick Duncan over 8 years ago

TI__Guru** 114905 points

Hi Kato-san,

We will investigate and reply soon.

Please note there is additional time from nSLEEP high to motor operational.

0 Sadanori Kato over 8 years ago in reply to Rick Duncan

Guru 36540 points

Hi Rick-san,

Thank you for your quick response and your advice.
I am looking forward to getting the detailed information from you.

Best regards,
Kato

0 Rick Duncan over 8 years ago in reply to Sadanori Kato

TI__Guru** 114905 points

Hi Kato-san,

This depends on how fast VM is ramping, and the external load of V3P3.
If VM is a fast ramp (<10us from 0 to above UVLO), it will take approximately 400us.
If VM is a slow ramp (>400us), V3P3 should be ready when UVLO releases.

0 Sadanori Kato over 8 years ago in reply to Rick Duncan

Guru 36540 points

Hi Rick-san,

Thank you for explaining so politely.
I understood.

Best regards,
Kato

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DRV8313 Starting Time for 3.3V Internal Regulator