This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

PGA2320 powersupply sequencing

Other Parts Discussed in Thread: PGA2320

HI,

I am using a PGA2320 in my design.

Due to many decoupling caps in the total design the inrush currents at start up on both the +/-15V supply and the +5V supply are quite big and cause startup problems in the front side DCDC converters (I am using post LDO's on all rails).

To get a reliable power supply start up I intend to sequence both supplies and implement a linear voltage ramp for these supplies to limit the inrush currents.

Downside is that the +/-15V and the +5V supplies do not start up at the same time and will start up slower (~100mS).

Can the PGA2320 gets damaged if the +/-15V and +5V supply do not start up at the same time?

Is there a minimum or maximum power supply startup dV/dT requirement?