LMG2100R044: FET power dissipation during IBB configuration

Kei Kuwahara

Part Number: LMG2100R044

Tool/software:

Hello team,

I would like to calculate the power dissipation of LMG2100 during IBB configuration.
Are the equations on section 8.2.2.4 applicable for IBB configuration?

For example, if the VIN = +20V, and VOUT = -5V, then the VIN for equation 5 would be 25V. Correct?

Best Regards,
Kei Kuwahara

5 months ago

+1 Adithya Ankam 5 months ago

TI__Prodigy 655 points

Hello Kei,

Yes the VIN voltage will be VIN-VOUT ( where Vout will be negative voltage) and in this case the VIN will be 20-(-5) = 25V.

Also you can refer to this Application Note on Inverting Buck-Boost configuration for further reference.

Application Note: https://www.tij.co.jp/jp/lit/SNVA897

Please reply back to get any more information regarding this query.

Regards,

Adithya Ankam

Power management

Power management forum

LMG2100R044: FET power dissipation during IBB configuration