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TPS53319: RF resistor current / package query

Part Number: TPS53319

RF pin in TPS53319 is used to control the switching frequency. Wanted to know the current that would flow through the R_RF resistor. Currently, customer have used a 0402 (40 mils x 20 mils) size resistor. If significant current flows through it, they would use a higher wattage and a larger size (0603) resistor to accommodate larger heat dissipation. Kindly advice.