Hello, I used in my design TPS5420 and everything is well but I have Reset circuit with 555 and It supply nearly 3.6 Voltage and it last 4 seconds in my old design I used LM2596S-ADJ and When I connect this signal to LM2596S reset pin.LM2596S-ADJ is shut down and power up again so unit reset. There is difference between LM2596S and TPS5420 reset pin LM2596 reset when pin is high TPS5420 reset when pin is low.So I use transistor and mosfet to pull down TPS5420's EN pin but I didn't success when ı pull down it TPS5420 didn't power up again or I didnt pull down EN pin voltage under0,5V .Our reset circuit check status pin if there is problem it started to count and after it reset LM2596 so How can ı adapt reset circuit in my new design ?
I attached my reset circuit
Best Regards
Mustafa
