JAJSG76C September 2018 – April 2024 LM5164
PRODUCTION DATA
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The on-time of the LM5164 high-side FET is determined by the RRON resistor and is inversely proportional to the input voltage, VIN. The inverse relationship with VIN results in a nearly constant frequency as VIN is varied. Use Equation 11 to calculate the on-time.
Use Equation 12 to determine the RRON resistor to set a specific switching frequency in CCM.
Select RRON for a minimum on-time (at maximum VIN) greater than 50 ns for proper operation. In addition to this minimum on-time, the maximum frequency for this device is limited to 1 MHz.