Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

In this part of our blog series about voltage regulator module (VRM) characteristics, we continue to consider output impedance, Z_OUT. 

In this installment of our blog series about Power Supply Ripple Rejection, we’ll take a break and shift our focus from PSRR to output impedance Z_OUT.

In this blog post, we continue our investigation into a VRM’s Power Supply Ripple Rejection (PSRR) performance. In earlier posts, we reviewed PSRR concepts by running a couple of simulations and now we power up a real VRM in the lab.