Linear Regulators: Another Option

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  • Longbow
    Badcaps Veteran
    • Jun 2011
    • 623
    • USA

    #1

    Linear Regulators: Another Option

    I want to bring to your attention a neat switching regulator drop-in replacement for the linear 78XX voltage regulators.

    muRata_78sr_2A_Regulator.pdf

    They come in vertical or horizontal packages and plug right into the holes that might be used for the TO-220. They are more expensive than a 78XX, but might be worth it if you otherwise have to dump a large input voltage through a linear regulator. Using the MuRata part, for example, would avoid the need for a large heat sink when using a 12v. input to a 5v. regulator running at 1 amp.
    Is it plugged in?
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30911
    • Albion

    #2
    Re: Linear Regulators: Another Option

    not a new idea.
    http://www.rapidonline.com/electrica...0-series-78072

    Comment

    • mariushm
      Badcaps Legend
      • May 2011
      • 3799

      #3
      Re: Linear Regulators: Another Option

      You can always build them by yourself, just get a decent switching regulator IC and build a small pcb.

      See for example AOZ1021 : http://www.digikey.com/product-detai...5-1-ND/1856090

      1.06$ in 25pcs for the IC, 0.5-1$ for inductor, 0.2$ for ceramic capacitors and resistors, maybe 0.2$ for pcb, if you panelize the small boards into a whole panel. So basically, under 2-2.5$ for each, maybe under 1.5$ if you make 250-500 pcs.

      Comment

      • ben7
        Capaholic
        • Jan 2011
        • 4059
        • USA

        #4
        Re: Linear Regulators: Another Option

        Originally posted by mariushm
        You can always build them by yourself, just get a decent switching regulator IC and build a small pcb.

        See for example AOZ1021 : http://www.digikey.com/product-detai...5-1-ND/1856090

        1.06$ in 25pcs for the IC, 0.5-1$ for inductor, 0.2$ for ceramic capacitors and resistors, maybe 0.2$ for pcb, if you panelize the small boards into a whole panel. So basically, under 2-2.5$ for each, maybe under 1.5$ if you make 250-500 pcs.
        I don't usually bother to make one myself, unless I really need to, because it takes time and money to design the PCB, get prototypes made, etc... and you might have stability issues, so you'd have to fix those in the design.

        Yes indeed these are not new, I've known about these replacements for a few years now. Only downside is they are switching ... not good in places where you actually NEED a linear regulator, for low noise.
        Muh-soggy-knee

        Comment

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