The LM25143-Q1 provides
internal slope compensation for stable operation
with peak current-mode control and a duty cycle
greater than 50%. Use Equation 10 to calculate the buck inductance to provide a
slope compensation contribution equal to one times
the inductor downslope.
Equation 10. ![GUID-56336D8E-FB51-4F97-ABE7-F7B88287CE19-low.gif](/ods/images/SNVSC11/GUID-56336D8E-FB51-4F97-ABE7-F7B88287CE19-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, which increases the full-load efficiency by reducing switch peak and RMS currents at the cost of requiring larger output capacitors to meet load-transient specifications.