3 Line Regulation

The injected ramp waveform leads to the average feedback voltage exceeding the reference voltage for which the output voltage was programmed with. Additionally, the waveform’s peak (Equation 4) is directly proportional to the input voltage, leading to further variance as V_IN changes. This variance is gained up through the feedback divider, resulting in the output voltage varying from the set point. Figure 3-1 and Table 3-1 gives a conceptual and quantitative measure how higher, peak ramp amplitude results in an increase in average feedback voltage (V_FB(AVG)).