topic Adding POR supervisor to PF3000 in Power Management

Adding POR supervisor to PF3000

ryanmartin — Mon, 11 May 2020 16:49:21 GMT

Hello, we would like to add a POR supervisor to the PF3000 PMIC circuit. We are using Vin=5V (USB) and want to ensure the power rails come up > 100ms after the USB power is applied to the device to meet USB inrush current specifications. We are using a coin cell battery on VSNVS, so VSNVS will always be ~ 3.0V. Is there a reference design available on how to add a POR supervisor to the PWRON pin?

Thanks,

Ryan

Re: Adding POR supervisor to PF3000

reyes — Mon, 11 May 2020 19:53:03 GMT

Hi Ryan,

Unfortunately, we do not have any reference design available on how to add a POR supervisor to the PWRON pin specifically for the PF3000 PMIC.

However, in different designs, we had handled the POR supervision using a standard voltage supervisor chip named CAT811R from Catalyst Semiconductor.

Consult CAT811R datasheet for details and check if it works for your application.

Hope this helps.

Regards,

Jose

NXP Semiconductors