LM43601: inverting buck boost, EN input level shift

Hiroyasu Koike

Part Number: LM43601

Tool/software:

There is a description about level shift in snva856b.pdf.
But on/off control is working on PSPICE without EN level shift circuit.
Is it OK doing without EN level shifting?

2 months ago

0 Naresh Adepu 2 months ago

TI__Expert 5585 points

Thanks for your question. I will get back to you

+1 Naresh Adepu 2 months ago in reply to Naresh Adepu

TI__Expert 5585 points

Some of our PSPICE models might have internal ground. In PSPICE, it is possible that enable comparator's ground might be internally given as ground. That is why it might be working here.

In IBB, device GND is -VOUT. EN will be referenced to -VOUT and you would need a level shifter in actual application.

So, its not OK doing without EN level shifter

Thanks and Regards

Naresh

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LM43601: inverting buck boost, EN input level shift