Requirement of negative input to negative output buck converter

Prakash Bharti

Prodigy 100 points

Hi TI team,

I have a requirement of negative input voltage to negative output converter.

Input voltage:- -22V to -27V

Required output voltage:- -5V or -3.3V

Also, suggest another converter with negative input voltage and positive output voltage.

Input voltage:- -22V to -27V

Output voltage :- 5V or 3.3V(For microcontroller)

Thanks & Regards,

Prakash

over 1 year ago

0 Frank De Stasi over 1 year ago

TI__Guru 71865 points

Hello

For a neg to neg buck you would use a boost converter or controller and level shifting.

I will re-assign this post to the boost group.

Thanks

0 Nini Zhong over 1 year ago

TI__Genius 13065 points

Hi Prakash,

Sorry that there is no boost or buck boost can maintain -22V input and -5V output and -22 to 3.3 V at the same time . Boost could convert from -22 to -5V. But you also need a buck to convert -22 to 3.3V . You should balance the two line and may need two bus to supply.

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Requirement of negative input to negative output buck converter