Load Regulation ΔVout/ΔIout and Output Impedance Zout
- Picotest
- Oct 23, 2023
- 1 min read
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:
Line Regulation
Load Regulation
For example, the LM317 datasheet of the early days [1] started its electrical characteristic table with the values as seen in Table 1:
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