October 6, 2023
Published on Microwave Journal.com
In Masashi’s latest installment of his ongoing blog series exploring Power Supply Ripple Rejection (PSRR), he takes a brief detour from PSRR investigations to shift his attention to another essential factor in voltage regulation: output impedance (ZOUT).
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 ZOUT.
Before the 21st century, most voltage regulator datasheets started their electrical characteristics (EC) tables with two key parameters:
For example, the LM317 datasheet of the early days  started its electrical characteristic table with the values as seen in Table 1:
Read the full article here - Load Regulation ΔVOUT/ΔIOUT and Output Impedance ZOUT | Microwave Journal