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LDO replacement for 7805?

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  1. 10th September 2007 12:18 PM #31
    eng1 eng1 is offline
    Quote Originally Posted by mvs sarma
    Perhaps there are low current devices as well while the one KA78R05 for e.g., can give 1amp load.
    Yes, I've read the datasheet you posted.

    For my requiremets I usually use the LM2937 (500 mA max). For more current, I have few LM2940's (Io = 1 A max, the drop-out voltage is 0.5 V typ. and 1 V max).
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  2. 10th September 2007 12:37 PM #32
    mvs sarma mvs sarma is offline
    Quote Originally Posted by eng1
    Yes, I've read the datasheet you posted.

    For my requiremets I usually use the LM2937 (500 mA max). For more current, I have few LM2940's (Io = 1 A max, the drop-out voltage is 0.5 V typ. and 1 V max).
    Well - you are right we don't get so free a supply of these LDOs in small Qty / retail. Incidentally one auctioner provided us with this chip(78R05) and finding comfortable.
    when a component is not on hand in 3D, only a 2D document (pdf) is to be enjoyed. Perhaps Digikey will supply and i shall be spending few$+$50 for the international post iteself.
    For eample, here i needed CY27EE16ZE to complete an Elektor (5/07) Project (Software Defined Radio) . Hope to get it some day!!
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    Regards,
    Sarma.
  3. 11th September 2007 12:33 AM #33
    mneary mneary is offline
    If it turns out that you need two regulators to handle the total load, you don't need to hook their outputs in parallel, just use one to supply the LEDs and the other to supply the TTL.
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