PF1510 taking power from VSYS?

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PF1510 taking power from VSYS?

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MT
NXP Employee
NXP Employee

A customer wants to power some LEDs from VSYS.

1) Is it OK to do this?

2) I assume the max current they could take would be the current taken would be dictated by the current limit setting for the Front-end LDO minus the current taken from the LDO/Switchers on the PF1510.

Thanks

Mark

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reyes
NXP TechSupport
NXP TechSupport

Hi Mark,

 

Yes, you can power some LEDs from VSYS power rail from the PF1510.

 

You are correct, the max current they could take is dictated by the current limit setting for the Front-end LDO minus the current taken from the LDO/Switchers on the PF1510.

 

Regards,

Jose Reyes

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reyes
NXP TechSupport
NXP TechSupport

Hi Mark,

 

Yes, you can power some LEDs from VSYS power rail from the PF1510.

 

You are correct, the max current they could take is dictated by the current limit setting for the Front-end LDO minus the current taken from the LDO/Switchers on the PF1510.

 

Regards,

Jose Reyes

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Sadatan123
Contributor I

Also Can we connect 5V to Vin of PF1510 and use Vsys to power input of all the switchers and LDO of  PMIC and also use Vsys to provide some pull ups on the boards?

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