This is a follow up question to Reason of multiple GND and VCC on an IC
I found a switching regulator IC (buck) that has multiple PGND pins and one analog ground (AGND). It has only one VCC pin. (Sorry, Could not attach a snapshot/datasheet as I could't find a public domain document for the same). Anyways it is a simple buck , with all usual pins + 3 PGND pins.
I understand the need for separate ground for analog circuitry and power circuitry .My doubts are:
What could be the reason for multiple power ground pins?
If this method of multiple ground pins are for higher current capability ( or any other advantage), why is it not followed by many SMPS IC manufacturers? I see many switching regulator ICs ( with similar rating) having single PGND pin.
Also shouldn't the VCC pins have the same count as GND pins?