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CMOS POWER(need help)? — Parallax Forums

CMOS POWER(need help)?

ArchiverArchiver Posts: 46,084
edited 2003-08-06 00:51 in General Discussion
I am planning to buy CMOS output GPS unit. it has input voltage
3.3Vdc +/-50 mV ripple allowed and draw 120mA during operation. how
could i do this power set up with a BS2 developing Board?
Battery(5~15V) rated will be used as a power source for my
application, and low power dissipation over new 3.3V regulator, and
hoping it to provide 250mA~400mA.

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-08-06 00:51
    In a message dated 8/5/2003 4:23:33 PM Pacific Daylight Time,
    sogilo@y... writes:

    >
    > I am planning to buy CMOS output GPS unit. it has input voltage
    > 3.3Vdc +/-50 mV ripple allowed and draw 120mA during operation. how
    > could i do this power set up with a BS2 developing Board?
    > Battery(5~15V) rated will be used as a power source for my
    > application, and low power dissipation over new 3.3V regulator, and
    > hoping it to provide 250mA~400mA.
    >

    <A
    HREF="http://www.national.com/ds/LM/LM117.pdf">http://www.national.com/ds/LM/LM1\
    17.pdf    </A>

    R2 = 420 ohms in your case. The output will be 3.3 volts.


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