LMZ10500/LMZ10501 Inverter Topology

David Escandon

Other Parts Discussed in Thread: LMZ10501, LMZ10500, LMZ12003, LMR14206, LMZ14203

Hello,

Can the LMZ10500 and LMZ10501 work in a negative inverter topology? If so, can you provide an application note or reference design. Thank you. I'm interested in getting a -5V, -3.3V, and -1.2V output from a positive 5V input.

David

over 12 years ago

0 Marc Davis-Marsh over 12 years ago

TI__Genius 10095 points

Hi David,

Yes the LMZ10500 and LMZ10501 can be used in an inverting topology but of the voltages you are looking at would only work for 3.3Vin to -1.2Vout.

For the -3.3V and -5V you could use the LMR14206, which is a very compact design. Or if you want to stay with a module the LMZ12003.

In terms of an application note, I will point you to a post, where I discuss the inverting application in more detail

https://e2e.ti.com/support/power_management/non-isolated_dcdc/int-non-isolated_dcdc/f/198/t/163138.aspx

and here is an application note with more information on inverting designs.

http://www.ti.com/lit/an/slva317a/slva317a.pdf

Regards,

Marc

0 Bert Hennink24 over 10 years ago in reply to Marc Davis-Marsh

Intellectual 335 points

I am also interested in generating negative supply with this type of parts but the links do not work here.

Where could i find more?

0 Marc Davis-Marsh over 10 years ago in reply to Bert Hennink24

TI__Genius 10095 points

The name of an ap note for the LMz14203 is.

Inverting Application for the LMZ14203 SIMPLE SWITCHER ...

The link for that ap-note is

www.ti.com/lit/an/snva425a/snva425a.pdf

Power management

Power management forum

LMZ10500/LMZ10501 Inverter Topology

Inverting Application for the LMZ14203 SIMPLE SWITCHER ...