Can VDSYS or DVSYS be used to source power

Sudeep Chandrasekaran

Other Parts Discussed in Thread: MSP430F6733

I am using a msp430F6733 which has two power sources.The switching is controlled by the AUX module.I have a external component (IrDa 2mA max)

which also needs to source from these power supplies.

Is it OK to source the external component from VDSYS ? If so how much current would VDSYS support (wasn't able to find it in the tech docs) ?

over 8 years ago

0 Leo Bosch over 8 years ago

Guru 23000 points

While DVsys is sourced from VDsys the note in the User’s Guide under ‘DigitalI/Os and Auxiliary Supplies’ applies also to VDsys.

0 Sudeep Chandrasekaran over 8 years ago in reply to Leo Bosch

Prodigy 130 points

Thanks for the lead. The Ron of the AUX module switch for my Uc is 5 Ohm.So even if I connect a load of peaks of 2mA the maximum
drop would be 10 mV which I think is acceptable.Hopefully I can use VDSYS to power the IrDa.

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Can VDSYS or DVSYS be used to source power