AnsweredAssumed Answered

ADP2442 shutdown output after some seconds

Question asked by staticboards on Jan 30, 2018
Latest reply on Feb 5, 2018 by Ryang



We are evaluating the ADP2442 ic. Our prototype is a basic dc dc converter, from 24V to 5V


This is the schematic (basically a copy&paste of the reference design):


dcdc schematic with ADP2442


If we connect the pin 6 (SYNC/MODE) to gnd (pulse skip mode), the circuit seems to work. We have 5V and we can supply current for a test load.


But if we use the fixed mode (pin 6 to vcc), the circuit works for a couple of seconds, and then, it shutdowns. We were looking for something strange, but at first, we dont see anything.


any idea or suggestion?


Thank you very much!!!