LM2576: Slow ON/OFF

Hi

LM2576 is old generation of 40V 3A  device , we recommend LMR33630 as new generation.

i have no idea of input type of on/off pin, but I have some question of the waveform.

1. for 12V short to GND, it is output voltage , and input is 24V, right?

2. I don't know what is C50+ of CH4, from CH3, when EN is at 1.6V, there is no CH2 waveform, I think CH2 is SW, so it match typical off value of EN threshold.

so what is your question about the output unstable ?

Thanks

Daniel Li

Hello

Anser the above questions.

1.That's right. The input voltage is 24V and the output voltage is 12V.

2.It is an electrolytic capacitor included in the protection circuit. When 12V and GND are short-circuited, the same voltage as pin 5 is applied.

The intent of my question is that when the internal control of the / ON / OFF terminal is CMOS or a transistor, and a signal with a slow rise and fall time is applied, the Vcc and GND lines due to the spike current generated during switching.

Since there is a possibility of output oscillation and malfunction due to the ripple of, I wanted to check what the internal control of the / ON / OFF terminal is.

Sorry to trouble you, but please answer.

TOSHIBA TEC CORPORATION Retail Solution Business Headquarters Embedded Manager

Shuto Kumamoto

Hello.

I've acknowledged. We are waiting for additional information about the / ON / OFF internal switch. Thanking you in advance.

Hi 

thanks, I will update when I get the answer.

Thanks

Hello.

thank you for your answer.

Could you give me a data sheet of the bipolar transistor of the ON / OFF internal switch?

If possible, I want it by February 23rd.

Thanks.