Other Parts Discussed in Thread: TPS65261, TPS65916, LP87332D, LP873220, TPS51200, TIDA-01425, TLV62130, TPS22965
I want to use two TPS65261 cascades to power the AM5706. the VDDSHV_1 to VDDSHV_11 are all 3.3V.The power-up sequence I want to achieve is VDDS_1V8-----VDA_PLL_1V8----VDD_DDR_1V35 -----VDD_CORE_AVS-----VDD_DSP_AVS---VDA_PHY_1V8-----VIO_3V3---ddr1_vref0(VTT_DDR)---H_PORz。
therefore, VIO_3V3 which is used to power VDDSHV1~VDDSH11(including VDDSH8) is the last power for AM5706。And it is used to generate DDR1_VREF and H_PORz. So i think the VDDR_VREFSTL(ddr1_vref0) is too later away from VDDS_DDR1? From the power up sequence pic,ddr1_vref0 and VDD_DDR_1V35 should be in front of VDD_DSP_AVS and other power,but from the note below,it says it just must be valid before porz rising ,not mention the relationship between ddr1_vref0 and VDD_DSP_AVS.
Besides I Even doubt it(ddr1_vref0)may after(behind)H_PORz. Is my idea correct? Is there any good advice about this ddr1_vref0 power supply?
As you see pic below ,Equivalent to putting ddr1_vref0 behind vddshv8 (3.3V, merged with other VDDSHX)。