LTC3786 Current Limit Protection

Question

As I know, LTC3786 has input current limit protection to protect input power. 
 How about output? 
 When input protection happened, the input voltage pass through to output. 
 Then output still work but voltage dropout, high side MOS will has risk damage. 
 Should I put a LT4363 on output side or else way to protect the device. 
 Thanks a lot.

ADIApproved · Accepted Answer

Hi, The datasheet of LTC3786 did not mention a current limit protection for the high side MOSFET in the event of short circuit or current limit. It will only reset itself during these instances and the input voltage will pass through the output because of the body diode of the MOSFET. However, you can utilize the PGOOD pin of the device to turn external system load off. In case of a sensitive load, external circuit breaker such as LTC1153 may be needed. 
 Regards,)

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LTC3786 Current Limit Protection