DRV8323: Linear Regulator Always On?

Keith Keller

Expert 7230 points

Part Number: DRV8323
Other Parts Discussed in Thread: DRV8304

Hello,

We are designing with the DRV8323 and also considering the DRV8304.

Could you please confirm that the integrated linear regulator is always on, even when ENABLE is low?

Thank you, Keith

over 5 years ago

0 Adam Sidelsky over 5 years ago

TI__Guru 65190 points

Keith,

Thanks for posting on the MD forum!

The DVDD regulator is regulated by the ENABLE pin, per the datasheet:

Regards,

-Adam

0 Keith Keller over 5 years ago in reply to Adam Sidelsky

TI__Expert 7230 points

Hi Adam,

Does TI have a recommendation on how to do wake up the DRV? The Enable pin has 5.75V_abs max, so it does not allow directly connecting it to the battery voltage. DVDD is not activated unless enabled, so the driver would have to be enabled for it to power the micro.

How should we connect the IC to have 3.3V LDO always on?

Thank you, Keith

0 Keith Keller over 5 years ago in reply to Keith Keller

TI__Expert 7230 points

We decided to use either the TPS70933 or the TLV70433 Linear Regulators to power our MCU.

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DRV8323: Linear Regulator Always On?