To do power saving for a battery operated product, I am using couple of load switches to shut down peripheral power when not using that.

PCB stackup - Signal(component), Gnd, Power, Signal -- 4 layers

There are few analog signals as well, one ADC, DAC IC - so the plan is to keep single ground plane with separate analog and digital routing.

The problem is - should I be splitting the power planes into multiple sections for each load switch output? Attached block diagram of the power section. Kindly suggest the best method. enter image description here

  • \$\begingroup\$ SWitched loads with Caps are disturbances in transient currents and voltages that even a plane may not help if the source impedance is not much much lower than the load. Also how much load ripple is expected. Can you compute LdI/dt + IR = V noise ? with conducted noise and radiated noise? \$\endgroup\$ – Sunnyskyguy EE75 Jan 12 at 7:15

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.