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MMPF0100 - Power Up / Shutdown

Question asked by David Kearney on Apr 5, 2017
Latest reply on Apr 6, 2017 by Yuri Muhin

Hey, a couple of questions regarding the state machine of the PF0100.

 

On startup, if not using the VSNVS o/p, is it OK to power Vin and PWRON on at the same time? i.e. both powered off main board 3V6 rail. Will the Vin UVDET make sure that the IC powers up correctly without having to put in a delay between Vin and PWRON? I'd like to minimise the amount of GPIOs to the  PMIC so if I can just attach PWRON to the same 3V6 rail as Vin this would work great. Would this also be OK during shutdown?

 

Also, is it possible to use the I2C interface to put the IC into Standby / Sleep modes? This would remove the requirement for dedicated interface GPIO lines, which would also be handy if possible.

 

I'd like to get the IO design down to just the I2C bus and Pgood lines if possible!

 

Many Thanks,

Dave

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