ZHCSES0C March 2016 – December 2022 LM5165-Q1
PRODUCTION DATA
Tie RT to GND to select PFM mode of operation. Set the switching frequency by the filter inductance, LF. Calculate an inductance of 47 μH based on the target PFM converter switching frequency of 500 kHz at 24-V input using Equation 19. Use a peak current limit setting, IPK(PFM), of 180 mA plus an additional 50% margin in this high-frequency design to include the effect of the 100-ns current limit comparator delay. Choose an inductor with saturation current rating well above the peak current limit setting, and allow for derating of the saturation current at the highest expected operating temperature.