Current limit detection occurs during the off-time bymonitoring the current through the low-side switchusing an external resistor, RLIM. The current limitvalue is defined by RLIM. If during the off-time thecurrent in the low-side switch exceeds the userdefined current limit value, the next on-time cycleis immediately terminated. Current sensing isachieved by comparing the voltage across the lowside FET with the voltage across the current limitset resistor RLIM. For example, the current limitvalue is 2.5A by the RLIM =55k. The current limitvalue rises when the set resistor RLIM rises. Themaximum output current is set by RLIM: RLIM (kΩ) =22• IMAX (A).