TPS3852-Q1: Schematic review and working current

Hi Jerry,

I do not see pull up resistors on the /RESET and /WDO pins.  Everything else looks good to me.

Ben

Hi Ben

Good, what about the point 2 "What are the normal operating current and quiescent current? What value should I refer to when in normal use?" Thank you.

Hi Jerry,

Not sure how I missed your second question but according to the datasheet, there is no distinction between operating and quiescent current.  Therefore, the IDD current is 10uA.  See below:

Ben  

Hi Ben

Thanks for your quick reply. So do you mean the working current and quiescent current is the same and 10uA both? Besides I have another question that, then if I want to use the two functions of :1. Watchdog output and 2. Reset output., and want to save a SoC RX port, is it feasible to connect RESET and WDO together and use a common port?

Hi Jerry, 

Zirui Su said:

So do you mean the working current and quiescent current is the same and 10uA both?

Yes.

Zirui Su said:

Besides I have another question that, then if I want to use the two functions of :1. Watchdog output and 2. Reset output., and want to save a SoC RX port, is it feasible to connect RESET and WDO together and use a common port?

Yes, that is okay.  Because the output of the /WDO and /RESET are open-drain outputs, tying them together will create a logic "OR" gate where either faults will be sent to the MCU.

Ben