Power Slew rate control on TI SDP3430

Hi,

Is it possible to configure the power slew rate (negative) on the TI SDP3430 ?

I need to control the Power-OFF delay for an external MMC memory (vdds_mmc1):

    * By default, the board slew rate (3V -> 2.4V) is about 1.2ms
    * I need a slew rate (3V -> 2.4V) around 500us


Thanks in advance,

Rodolphe