The LM5148-Q1 provides internal slope compensation for stable operation with peak
current-mode control and a duty cycle greater than 50%. Calculate the buck inductance to
provide a slope compensation contribution equal to one times the inductor downslope using
Equation 9.
Equation 9. ![GUID-11680102-9851-4D70-B8C0-D7C87CB9283A-low.gif](/ods/images/SNVSC00/GUID-11680102-9851-4D70-B8C0-D7C87CB9283A-low.gif)
- A lower inductance value generally increases the peak-to-peak inductor current, which minimizes size and cost, and improves transient response at the cost of reduced light-load efficiency due to higher cores losses and peak currents.
- A higher inductance value generally decreases the
peak-to-peak inductor current, reducing switch peak and RMS currents at the cost of
requiring larger output capacitors to meet load-transient specifications.