LT1054: DESIGN REVIEW

Melbin Manuel

Intellectual 300 points

Part Number: LT1054
Other Parts Discussed in Thread: DRV135

Hello,

We are working on a project with a -12V requirement. I have regulated 12V supply on my board.

Kindly review the attached design and let me know the comments.

over 4 years ago

0 Garrett Roecker over 4 years ago

TI__Mastermind 21720 points

Hi Melbin,

Thanks for reaching your question and for considering the LT1054 in your design.

Can you please repost the schematic? I am not able to see it. For the application, what is the maximum load current for the the -12V?

Thanks,

Garrett

0 Melbin Manuel over 4 years ago in reply to Garrett Roecker

Intellectual 300 points

Hi Garrettt,

The -12V is connected to the -ve supply of Audio driver DRV135. So I am expecting a load current of 6mA.

Please find the schematics attached below

SCHEMATIC1 _ P14 _ AUDIO DRIVER.pdf

0 Brigitte over 4 years ago in reply to Melbin Manuel

TI__Guru 65180 points

Hello Melbin,

The schematic looks good.

In general you could remove the resistor divider if you have a regulated 12V supply as the LT1054 will then invert the input voltage to a negative voltage that is slightly lower than the input voltage.

Even with the resistor divider, the output voltage will be lower than the input voltage, see the voltage loss specification in the electrical characteristics of the datasheet.

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LT1054: DESIGN REVIEW