SNVS480J January 2007 – July 2020 LM5022
This term accounts for the current drawn at the VIN pin. This current, IIN, drives the logic circuitry and the power MOSFETs. The gate driving loss term from MOSFET is included in the chip operating loss. For the LM5022, IIN is equal to the steady-state operating current, ICC, plus the MOSFET driving current, IGC. Power is lost as this current passes through the internal linear regulator of the LM5022 in Equation 59.