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LM2623: LM2623

Part Number: LM2623
Other Parts Discussed in Thread: LMR61428

Hello I want too use LMR61428 as an alternate for LM2623. I have found out that the only difference between these parts is the junction to ambient temperature for LM2623 is is 152.5C/W & for LMR61428 it is 240W/C. My the question arises here is, can I use this LMR61428 as an alternate for LM2623. Thanks