LM5164-Q1: buck boost inverting

Hiroyasu Koike

Part Number: LM5164-Q1

I used WEBENCH as following settings.

VIN min : 10V
VIN max : 16.8V
VOUT : -15V
current : 0.1A

LM5164-Q1 was listed, so I tried pspice simulation but could not get -15V output.
I could not find "buck boost" and "inverting" description in LM5164-Q1 datasheet.

LM5164-Q1 can really generate -15V?

over 1 year ago

0 David Baba over 1 year ago

TI__Mastermind 39930 points

Hello Hiroyasu,

Unfortunately, simulation in IBB for this device is not possible, it is likely the internal sub circuits are ground tied and they need to be tied to -VOUT. Please use the schematic that WEBENCH provide as a starting point. I also link a paper on IBB considerations for more information.

Working with Inverting Buck-Boost Converters (Rev. B)

Thanks.

David.

Power management

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LM5164-Q1: buck boost inverting