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by SAI_Peregrinus
2258 days ago
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I'm a big fan of the LT3574 switching regulator[1]. Makes it very easy to split an input supply out to dual rails for op-amps, or just for general regulation. It provides an isolated output without needing optoisolators or a sense winding on the transformer. And since they're flyback converters they can output a voltage above or below the input, allowing for wide variation in the input needed. And in typical LT fashion the datasheet is extremely thorough and well-written. Including a step-by-step design example. And plenty of reference designs. I use the +-12V output one quite a bit for powering op-amps, it lets me make use of the fixed 5V output third channel on my bench supply! Not the cheapest though, about $7 each in qt1 on DigiKey, but that's rarely an issue at the hobby scale. And the ability to use a cheaper transformer and not need an optoisolator can make it save BOM cost even at large scale production. [1] https://www.analog.com/media/en/technical-documentation/data... |
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