The boost converter has the cycle-by-cycle peak current limit on the internal Power MOSFET switch to serve as the secondary protection when LNB output is hard short. With ISW bit default setting 0b on I²C control register 0x01, the switch current limit I_SW is proportional as LDO current limit I_(OCP) set by ISET pin resistor, and the relationship can be expressed as:

For the 5 V V_IN, if LNB current load is up to 1 A, the ISW bit should be written as 1b, the switch current limit I_SW for the internal Power MOSFET is:

While due to the high power loss at 5 V, V_IN, it has a chance to trigger the thermal shutdown before the loading is up to 1 A, especially the VLNB output is high.