TPS51397A: Configured as IBB

Phillip Karls

Prodigy 80 points

Part Number: TPS51397A
Other Parts Discussed in Thread: TPS51386

I am considering using the TPS51397A as a IBB to convert 12V to -5V @ ~4A, using SNVA856B as a guide.

Is there any specific about the TPS51397A that would prevent it from working as a IBB?

Thanks!

10 months ago

+1 Yuchang Zhang 10 months ago

TI__Mastermind 18510 points

We didn't use it for IBB application before, but in theory, it should be ok for your application.

Just For EN and PG control external control, you may refer to Using the TPS62120 in an Inverting Buck-Boost Topology (Rev. C)

And based on your current requirement, you may also choose TPS51386 lower current part

Yuchang

0 Phillip Karls 10 months ago in reply to Yuchang Zhang

Prodigy 80 points

Thanks for the reply.

I ordered the eval board, adjusted R7, and put a cap between Vin and Vout (Gnd in the IBB configuration). It works fine as an IBB (88% efficient at 2.5A).

0 Yuchang Zhang 10 months ago in reply to Phillip Karls

TI__Mastermind 18510 points

No problem and Great to know that.

Yuchang

Power management

Power management forum

TPS51397A: Configured as IBB