We are designing a board for industrial application with maximum temperature of 85C, based on IMX536 processor in our design with PMIC 34709.
But there is a problem regarding current requirement, VGEN2(2.5V) Rail of PMIC is connected to VDD_REG of IMX53.
The current required by IMX53's VDD_REG rail [it powers VDD_ANA_PLL(1.8V) and VDD_DIG_PLL(1.3V) also] is 325mA and current provided by PMIC's VGEN2 rail 250mA which is less,
- How is it possible?
So,we are powering VDD_ANA_PLL(1.8V) and VDD_DIG_PLL(1.3V) externally from VUSB2 LDO(2.5V) of PMIC, is it possible to do so? This has not been implemented any where.
- Will it affect USB usage in our case as we are planning to use USB also ?
- Is there any power up sequence required for rails "VDD_ANA_PLL(1.8V) and VDD_DIG_PLL(1.3V)" ?