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AM6442: VPP current consumption

Thierry HAUSER
Intellectual 360 points
Part Number: AM6442

Hello,

I wondering the current consumption of VPP power OTP fuse.

Into SPRSP56E datasheet, table 7.8.1 :   I(vpp) is mentionned as 400mA max.

Into SK evalboard schematic is mentionned 150mA :

What current should I take in account? 

Thanks for your help.

  • 0
    TI__Guru 60965 points

    The EVM appears to have been based on the requirements of a previous device, which is the only information the hardware development team had when the EVM was designed. The current was increased to address worst case current transients that must be satisfied to ensure the VPP supply never drops below the minimum operating voltage defined in the Recommended Operating Conditions table of the datasheet.

    It is very important to select an LDO with very fast transient response and connect its output to the VPP pin with a low loop inductance path to ensure it is able to source the high transient load, where the VPP pin never drops below the minimum operating voltage. 

    Regards,
    Paul