LM2731

[daleInmelb]

I am perplexed with the app note for this...
http://www.national.com/images/pf/LM2731/20059110.pdf

How is this device meant to 'shutdown' if Vin is always connected to
Vout via the inductor? or does shutdown just mean shutdown the
switcher?

Dale

 

[Jamie]

daleInmelb wrote:

I am perplexed with the app note for this...
http://www.national.com/images/pf/LM2731/20059110.pdf

How is this device meant to 'shutdown' if Vin is always connected to
Vout via the inductor? or does shutdown just mean shutdown the
switcher?

Dale

just the switcher, it will simply output the 5 volts.

I've seen that option used before in a time delay onstart
so that output load does not cause the switcher to have
starting problems with heavy inrushes ..



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