I am replacing a V4FX20 chip with a V4FX40 on a board. I am a little bit concerned with the power-on requirements of the bigger chip. The existing core voltage power supply is designed for 1A. The datasheet says that Iccintmin is 244 mA typically, but can be as big as 1.65A under worst process, voltage and temperature conditions. It also says that the actual current consumed depends on the power-on ramp rate of the power supply. I wonder if there is some more precise information on how it actually depends on it?... Also, the board is never going to see worst ambient temperature or voltage conditions. Am I safe with 1A of continious current? Unfortunately, replacing the regulator is not easy due to very limited space and some other issues...
Thanks, /Mikhail