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LV5144: LV5144 vs LM5146-Q1

Sahil Gupta
Prodigy 70 points
Part Number: LV5144
Other Parts Discussed in Thread: LM5146-Q1, , LM5145, LM25145, LM5146

Tool/software:

Hi All, 

I was planning to use earlier LM5146-Q1 for my DC-DC buck design. 

Just came across LV5144 - looks like it is exact pin to pin replacement - except 3 major differences. 

Vin max for LV5144 is 95 Volts, Vin max for LM5146-Q1 is 100 Volts. 

Ioutmax for LV5144 is 20 A, Ioutmax for LM5146-Q1 is 30 A.

LV5144 is way cheaper than LM5146-Q1. 

I have 3 designs - 10 A/20A/30A .

Can you please confirm if I wont be able to use LV5144 for 30 A?

if LV5144 and LM5146-Q1 are 99 percent similar - can LM5144 be used for 30 A also?

Really appreciate your guidance and support. 

Thanks

Sahil

  • +1
    TI__Guru 57802 points

    Hi Sahil, 

    Yes, it's the same controller family. We also have the LM5145 and LM25145 with 75V and 42V max Vin, respectively. Don't worry about the output current spec - that is purely dependent on the power stage.

    Note if you don't need automotive, we also have the LM5146 100V version. The LM5145-Q1 and LM5146-Q1 are the automotive parts within the family.

    Regards,

    Tim