TPS561201: How to select each of component value when using this part as inverting DCDC converter?

user4292685

Intellectual 945 points

Part Number: TPS561201
Other Parts Discussed in Thread: TPS62120

Now I try to use TPS561201 as inverting DCDC converter below input/output condition.

Vin = 5.4V

Vout = -5.5V

Iout = 0.01A

In this case how to select each component value as below?

Cin, Cout, L, Cbst

Regards,

over 7 years ago

0 Jason Wang (BSR-MV) over 7 years ago

TI__Genius 9550 points

hi, TPS561201 is a buck converter, do no support Vout>Vin application.

0 Chris Glaser over 7 years ago

TI__Guru**** 150950 points

Hi User,

For this inverting application, this reference design with the TPS62120 does what you need: http://www.ti.com/tool/pmp9752

0 user4292685 over 7 years ago in reply to Jason Wang (BSR-MV)

Intellectual 945 points

I plan to use this DCDC for an inverting DCDC. So it isn't your case.

0 user4292685 over 7 years ago in reply to user4292685

Intellectual 945 points

Please refer to the above my comment.

0 Jason Wang (BSR-MV) over 7 years ago in reply to user4292685

TI__Genius 9550 points

Hi,
for your request, vin 5.4V and Vout 5.5V, it need a boost converter. TPS561201 is buck converter, so can't meet your request. Please open a new thread to seek a boost converter.

0 user4292685 over 7 years ago in reply to Jason Wang (BSR-MV)

Intellectual 945 points

My case is 5.4V input / -5.5V output. So I would like to use this part as an inverting DCDC use case, not boost converter case.

Actually Chris-san mentioned that this part is able to use as an inverting DCDC converter as comment before on this thread.

0 Jason Wang (BSR-MV) over 7 years ago in reply to user4292685

TI__Genius 9550 points

Noticed that you asked same application in another thread, so please connect Anthony via email to get answer. anthony-lang@ti.com

0 user4292685 over 7 years ago in reply to Jason Wang (BSR-MV)

Intellectual 945 points

Hi Jason,

Understood. I will merge item which is related with tps561201 as inverting DCDC converter to this thread.

And once my question is clear by replaying from Anthony, i will close this thread.

So please wait for a moment.

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TPS561201: How to select each of component value when using this part as inverting DCDC converter?