TPS723: Negative output solution for higher than -1.2V?

Shinya Sawamoto

Expert 5285 points

Part Number: TPS723

Hello,

Is there any good negative output LDO solution which can output higher than -1.2V(e.g. -0.7V) of TPS723 limitation?

Thanks in advance.
S.Sawamoto

over 5 years ago

0 Stephen Ziel over 5 years ago

TI__Mastermind 37005 points

Hello Shinya,

I searched TI's website for negative linear regulators that can go higher than 1.2V, but I did not locate any.
This type of request is not new. One technique that is published requires floating the linear regulator to achieve an output voltage less than +1.2V or more than -1.2V, depending on whether your linear regulator is positive or negative.

Please see the following app note for details on this technique. Page 7, figure 3, gives a schematic example for a positive linear regulator but the technique can be used for a negative linear regulator as well.

www.ti.com/.../slyc147.pdf

Thanks,

- Stephen

0 Stephen Ziel over 5 years ago in reply to Stephen Ziel

TI__Mastermind 37005 points

Hello Shinya,

There is a better reference document that I would like provide on this topic.
This concept may work better for your application, and does not require a floating linear regulator.

http://www.ti.com/lit/an/slva216/slva216.pdf

Thanks,

- Stephen

0 Shinya Sawamoto over 5 years ago in reply to Stephen Ziel

TI__Expert 5285 points

Hi Stephen,

Thanks a lot for the helpful information.

Regards,
S.Sawamoto

Power management

Power management forum

TPS723: Negative output solution for higher than -1.2V?