LM5156: Creating dubble +/-35V from single 12V

Filipe Satake

Prodigy 30 points

Part Number: LM5156
Other Parts Discussed in Thread: PMP31257, PMP7932, , LM5157

Hi Experts,

I need to create +/- 35V from single +12V to supply some Op Amp.

Could you help me how is the best IC for this purpose, and it is possible to create this?

Any idea will be welcomed.

Thank you,

Filipe

5 months ago

0 Feng Ji 5 months ago

TI__Genius 13405 points

Hi Filipe,

Can you share you current?

I suppose the current shoule be in 50mA range.

You may refer to PMP31257.

Best Regards,

Feng

0 Filipe Satake 5 months ago in reply to Feng Ji

Prodigy 30 points

The current is under discution, but probly about Max 500mA for supply 16ch OpAmp.
The PMP31257 only has the reference design, but there is no datasheet.

Could you share with me?

Best,
Filipe

0 Feng Ji 5 months ago in reply to Filipe Satake

TI__Genius 13405 points

Hi Filipe,

I suppose https://www.ti.com/tool/PMP31257 is valid only for 100mA or less.

You may refer to https://www.ti.com/tool/PMP7932 if 500mA is required.

Best Regards,

Feng

0 Filipe Satake 5 months ago in reply to Feng Ji

Prodigy 30 points

Hi Feng,

Can I replace to LM5156 for PMP7932 design?

Best,
Filipe

0 Feng Ji 5 months ago in reply to Filipe Satake

TI__Genius 13405 points

Hi Filipe,

Yes. You can consider LM5156 or LM5157 depending on the application.

Best Regards,

Feng

0 Filipe Satake 5 months ago in reply to Feng Ji

Prodigy 30 points

Thank you!

I will try here, and I will let you know if I get some issue.

Best,
Filipe

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LM5156: Creating dubble +/-35V from single 12V