Hello.
I am having a coulpe of issues with the LM25119.
I am only using 1ch from the chip for now and have disabled CH2.
Running at 50khz Vin18V , Vout 12V. Max output current 25amps.
Issue 1 - I power up the reg with no load, and the Vout is 4volts. And the FET is getting pulses very slowy. Once you connect a load (400mA) the reg come to life and Vout is 12V.
Issue 2 - With reg running a light load, When I connect a 20amp load , Vout drops down to 4volts and after approx 700mS the reg kicks back into life and supply's 12V and 20amps.
Has anyone come across these issues before?
Regards
Steven