TPS51397A: Regarding Buck regulator selection

Bhuvaneshwari K

Intellectual 370 points

Part Number: TPS51397A
Other Parts Discussed in Thread: TPS51388, TPS51397

Tool/software:

Hi,

Could you please suggest a Buck switching regulator of 12 to +/-5 V which sustains up to 6A current and +/-20mV ripple

10 months ago

0 Aurora Tie 10 months ago

TI__Genius 16770 points

Hi,

I think TPS51397A and TPS51388 are all ok for your application. You can apply our EVM from TI.com for evaluating. For IBB design, using Power Designer and this application note Working with Inverting Buck-Boost Converters (Rev. B) is a good start.

Thanks.

Aurora

0 Bhuvaneshwari K 10 months ago in reply to Aurora Tie

Intellectual 370 points

Hi Aurora,

Thanks for your response.

Please share the part number of same spec with 12 to -5V conversion.

Thanks.

0 Aurora Tie 10 months ago in reply to Bhuvaneshwari K

TI__Genius 16770 points

Hi,

Pls see TPS51388 and TPS51397A. And refer to IBB design guide above. Thanks.

Aurora

0 Bhuvaneshwari K 10 months ago in reply to Aurora Tie

Intellectual 370 points

Hi Aurora ,

Thank you so much for your response.

The part numbers which you have suggested has a positive input and output configuration.

Please suggest a part number which has a negative output configuration with current rating 6A.

TPS63710- this part has max rating of 1A, but please suggest me a part with minimum 4A.

Thanks and regards,

Bhuvaneshwari

0 Aurora Tie 10 months ago in reply to Bhuvaneshwari K

TI__Genius 16770 points

Hi,

Positive output is ok. Pls see below application note to use buck device to get inverting buck-boost converters at first. These two device (TPS51388 and TPS51397) are suitable. All buck devices will not have negative output, you should do some change to use it as an IBB converter. Hope this is clear.

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

Aurora

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TPS51397A: Regarding Buck regulator selection