LM76005: 48V to 3.3V output - LM76005RNPR

Amit Nene

Prodigy 20 points

Part Number: LM76005

Tool/software:

Hello,

I am hoping to convert 48V input to 3.3V output using the LM76005RNPR. Could you please verify the schematic?

9 months ago

0 David Baba 9 months ago

TI__Mastermind 40410 points

Hello Amit,

Please can you fill out the calculator spreadheet with your specification found in the product folder and post here, so I can review your design against it.

Thanks. David.

0 Amit Nene 9 months ago in reply to David Baba

Prodigy 20 points

3107.WBOperatingValuesDesign2.csv

0 David Baba 9 months ago in reply to Amit Nene

TI__Mastermind 40410 points

Hello Amit,

Sorry for the confusion, please fill out the calculator spreadsheet, link below.

LM76005-DESIGN-CALC Calculation tool | TI.com

David.

0 Amit Nene 9 months ago in reply to David Baba

Prodigy 20 points

1638.Copy of LM76005-Q1 quickstart tool - rev A1.1.xlsm

0 David Baba 9 months ago in reply to Amit Nene

TI__Mastermind 40410 points

Hello Amit,

Design looks ok, please add to your schematic the components highlighted below.

Also please consider more input capacitance if you take into account the derating of the CIN to be ~50% drop at high VIN. Perhaps 2 x 47uF? you can always not populate if performance at input meets your specification. also, if you have an input filter in your design, and or you have long cables to the input please consider a damping electrolytic cap.

Hope this helps.

0 Amit Nene 9 months ago in reply to David Baba

Prodigy 20 points

Ok, Thank you. Added additional 47uF capacitor in the input.I have 22nF capacitor at Css. I guess that should be ok?

0 David Baba 9 months ago in reply to Amit Nene

TI__Mastermind 40410 points

Hello Amit,

Yes, this is now fine.

David.

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LM76005: 48V to 3.3V output - LM76005RNPR