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Alternate Part for MC34063ADR part

Other Parts Discussed in Thread: LM2597HV, LM2594HV

Hi am looking for the alternate of mc34063adr part which can with stand input voltage up to 50 V in the same package.

Let me knoe if anybody has the idea on the same.






  • Hello Abhinay,

    The MC34063 is a second sourced device originally from Motorola (On Semi) and also made by TI and National Semiconductor (Now known as TI-SVA).  This part can be used in several topologies with up to 40V input.  There are very few other devices which allow the choice of several topologies. If you could tell us which topology you need with 50V input I could make a more clear recommendation.   Vin range Vout and Iout and chosen topology.  Are you using this as a controller or a standalone regulator?

    Off hand;  the LM2594HV 0.5A Buck (or LM2597HV.)  Maybe LM5001MA for Boost and flyback applications.

    Alan Martin  TI-SVA