Part Number: TPS54561
just want to check with you if adding a 5.4V bias voltage on Boot pin through a diode is OK for normal operation or not.
The 5.4V power up before Vin and shut down before Vin. Thanks.
I think that should be ok, but just be aware of the maximum boot voltage limit for the pin
I can see that there is an app note similar to what you are trying to do
I would say that you should power the 5.4V up after you power the VIN
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In reply to Arief Hernadi:
Thanks for your reply.
one more question, why does the 5.4V up after Vin? It seems no difference from my perspective. Thanks.
In reply to Given Ding:
Any feedback? Thanks.
For me it is just a precaution so that the external bias does not interfere with normal startup sequence of the IC.
I believe Arief was able to help you out here.
Let us know if this design requires more help.
Marshall Beck Texas Instruments, Power Applications
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