Hello,
Could you please kindly let me know the answer of below three questions of LM48511?
Our customer use LM48511 and they shutdown by power off of "Vdd pin" and not used "SD_AMP pin".
In this case, LM48511 occured pop noize when power on/off of Vdd.
In this case, LM48511 occured pop noize when power on/off of Vdd.
(1)
Please see the attached file as LM48511 schematic.
This schematic is after countermeasure schematic.
Is this schematic noproblem?
Please see the attached file as LM48511 schematic.
This schematic is after countermeasure schematic.
Is this schematic noproblem?
(2)
PWR_OFF signal of 3.3V rise after 5V Vdd and fall before 5V vdd.
Is this seaquence no problem?
PWR_OFF signal of 3.3V rise after 5V Vdd and fall before 5V vdd.
Is this seaquence no problem?
(3)
If we shutdown LM48511 by Power ON/OFF of "Vdd" and not use "SD_AMP pin", are there any possibility of popnoise?
In the datasheet, there is "Connect to VDD for normal operation" as discription of SD_AMP pin.
Best regards,
Ryuji Asaka