Figure 3-5 and Figure 3-6 show how the system responds to a load step from 0Ω to 2.5Ω where the input voltage is 48V, the output voltage is 20V and 35V respectively.

Figure 3-5, with a 20V output voltage, experiences an 8A increase in current as a load is applied, and this results in an undershoot of 150mV or 0.75%. Figure 3-6, with a 35V output voltage, experiences a 14A increase in current as a load is applied, and this results in an undershoot of 250mV or 0.7%.

Figure 3-5 20V_OUT, 2.5Ω Load Step

Figure 3-6 35V_OUT, 2.5Ω Load Step

Figure 3-7 and Figure 3-8 show how the system responds to a load dump from 2.5Ω to 0Ω where the input voltage is 48V, and the output voltage is 20V and 35V respectively.

Figure 3-7, with a 20V output voltage, experiences an 8A decrease in current as the load is disconnected, and this results in an overshoot of 330mV or 1.65%. Figure 3-8, with a 35V output voltage, experiences a 14A decrease in current as the load is disconnected, and this results in an overshoot of 550mV or 1.57%.

Figure 3-7 20V_OUT, 2.5Ω Load Dump

Figure 3-8 35V_OUT, 2.5Ω Load Dump