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3.3V step-up IC for Propeller apps? — Parallax Forums

3.3V step-up IC for Propeller apps?

Lord SteveLord Steve Posts: 206
edited 2009-12-18 11:55 in Propeller 1
I want to run a Propeller project from 2 AA batteries.· I also want to be able to use rechargeables.· So, could anyone suggest a good 3.3V-output step-up IC suitable for such a purpose?· I found the TPS63001, but Digi-Key and Mouser don't have 'em in stock.· Man, that looked sweet, though.

Thanks.

Comments

  • Peter JakackiPeter Jakacki Posts: 10,193
    edited 2009-12-16 08:11
    Try Newark/Farnell, they have 2900 available on cut tape.

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  • AleAle Posts: 2,363
    edited 2009-12-16 08:16
    Did you know those 10SON packages are tiny ? The TPS61070 is a bit less demanding and uses a SOT-3 6 pin package. It requires 1 inductor, 2 caps and 2 resistors. Very neat but only up to 800 mA or so.

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  • PhilldapillPhilldapill Posts: 1,283
    edited 2009-12-16 09:06
    I ordered some of these as "samples" from TI a while back. They're great!
  • Lord SteveLord Steve Posts: 206
    edited 2009-12-16 17:53
    Philldapill said...
    I ordered some of these as "samples" from TI a while back. They're great!
    Are you referring to TPS61070 or to TPS 63001?
  • PhilldapillPhilldapill Posts: 1,283
    edited 2009-12-16 18:06
    Sorry - I was refering to the TPS63001. I've never tried the TPS61070, but the package might be easier to work with if your soldering skills(or eye sight) can't do the SON package.
  • Lord SteveLord Steve Posts: 206
    edited 2009-12-16 19:19
    Philldapill said...
    Sorry - I was refering to the TPS63001. I've never tried the TPS61070, but the package might be easier to work with if your soldering skills(or eye sight) can't do the SON package.
    In what kind of project did you use the TP63001?
  • dMajodMajo Posts: 855
    edited 2009-12-16 19:50
    Have a look at these: MAX1708, MAX1763 and MAX848 (with built-in 2ch·V2f 1-Wire ADC)

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  • PhilldapillPhilldapill Posts: 1,283
    edited 2009-12-16 20:08
    I used the TPS63001 in a stand-alone voltage regulator for my breadboard. I haven't put it in a full project yet, but I use it for many different breadboarded projects since I can run it off 3 AAA batteries, and not worry about the voltage getting low(unless the batteries are totally dead...).
  • Lord SteveLord Steve Posts: 206
    edited 2009-12-16 22:37
    Thanks, dMajo.· I looked at those Maxim chips but they seem expensive, even at quantity in the 100s.
  • VIRANDVIRAND Posts: 656
    edited 2009-12-18 00:35
    How about a step up regulator for 1 or 1.5V input to 3.3 or 5 output.
    Doesn't it make sense? I've seen some digital devices running on one AA battery.
    Anyone know an efficient chip that does that?
  • Peter JakackiPeter Jakacki Posts: 10,193
    edited 2009-12-18 00:54
    VIRAND said...
    How about a step up regulator for 1 or 1.5V input to 3.3 or 5 output.
    Doesn't it make sense? I've seen some digital devices running on one AA battery.
    Anyone know an efficient chip that does that?

    Makes sense to actually read the thread and datasheets too roll.gif
    (hint: TPS61070 0.9V to 5.5V input)

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  • Mike GreenMike Green Posts: 23,101
    edited 2009-12-18 02:47
    SparkFun has a nice assembled DC to DC converter that comes set for 5V output, but can be changed with one resistor change to 3.3V at up to 300mA. It'll start up with an input voltage as low as 1V.

    www.sparkfun.com/datasheets/Prototyping/Batteries/VPack_PCB_v1r1_general.pdf
  • Erik FriesenErik Friesen Posts: 1,071
    edited 2009-12-18 03:01
    I have used the 61070 and it works well, at least using two AA's. You have to watch your power usage with that as the propeller can be a bit hungry if you are running all eight cogs wide open.
  • QuattroRS4QuattroRS4 Posts: 916
    edited 2009-12-18 11:55
    Or try this ... MAX1947 .. see attached link to pdf..

    www.igniteautomation.com/docs/max1947.pdf

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    Post Edited (QuattroRS4) : 12/18/2009 12:01:37 PM GMT
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