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DC -> DC

Discussion in 'Electronic Design' started by Gecke Rün, May 24, 2004.

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  1. Gecke Rün

    Gecke Rün Guest

    hi all,

    I have some questions regarding information I recieved. I have an external
    source which delivers my PCB with 10V DC. I need 3 DC voltages: 3.3, 1.8 and
    1.5V . The person suggested to use a 'switched mode convertor' to bring the
    voltage to 3.3 V and use 2 'lineair convertors' to get the 1.8 and 1.5V .

    I have some questions. Is this the way you guys would get the 3 DC
    voltages.. IF so, an internet search has not given me enough information
    regarding the SMC or LC. Maybe someone can point me a manufactor that
    produces these things?

    kind regards
    Stijn
     
  2. Joerg

    Joerg Guest

    Hi Stijn,

    If it is higher current (more than a few hudred mA) you can use "buck
    converters". Check the "simple switcher" series from National for an easy
    solution. I think Texas even has converters with te inductors and all in there.

    Low currents can be done with the usual linear regulators. Or a mix if, for
    example, only your 3.3V is high current.

    Regards, Joerg
     
  3. Ken Taylor

    Ken Taylor Guest

    Suggest you try Maxim for a start, they have plenty of IC's which will do
    this, although I can't recall offhand whether they do it in one chip or not
    (I think they do). Look at:
    http://para.maxim-ic.com/PowerSupplies.htm
    they have data sheets and application notes on-line. National Semiconductor
    are also worth a look.

    Ken
     
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