good step up/down regulator for battery-powered sensors (3.3v)?

[ahhk]

Hi,

i searched a lot and read a lot about step-up and step-down converters in the last days, but i didnt find a really "good one" - and already soldered on pcb. Soldering is in general not a problem for me, except smd (i hate smd soldering). Has anyone a hint for a good booster (2xAA => 3.3V) or a step-down-regulator (3xAA => 3.3V) ?

Greetings

Andreas

[ericvdb]

For step-down, i think MCP1702 is a verry good candidate.

[ahhk]

Looks interesting in TO92 standard...just saw the smd-version of it.

And what would be a good stepup-converter?

[bjornhallberg]

If I recall correctly, the step up module from Ebay (I think it is in the store?) ended up being pretty good after all. Someone on the forum tested it long term I think.

I picked Linear LTC3525 and Texas Instruments TPS61221 for my temporary modules.
http://forum.mysensors.org/topic/930/step-up-boost-regulator-pcbs

In the future though I hope to have a board with everything on-board. No add-on boards or anything. Except for the "smd" radio module. Look at the custom boards that people have started making:
http://forum.mysensors.org/topic/1857/my-sensor-node-motherboard-mysensorsnode
http://forum.mysensors.org/topic/1419/sensor-board-with-booster-and-supervisor/31

[m26872]

@bjornhallberg said:

If I recall correctly, the step up module from Ebay (I think it is in the store?) ended up being pretty good after all. Someone on the forum tested it long term I think.

Perhaps you were referring to my tests in this thread.
http://forum.mysensors.org/topic/486/my-2aa-battery-sensor
With a better code (eg remove all unecessary battery level updates), my test nodes performance should be much better, but still, I can't see any quiescent current issues with the china/ebay step-ups that I have. I suppose my early measurement of <100uA is about correct.

[NeverDie]

@ahhk said:

Hi,

i searched a lot and read a lot about step-up and step-down converters in the last days, but i didnt find a really "good one" - and already soldered on pcb. Soldering is in general not a problem for me, except smd (i hate smd soldering). Has anyone a hint for a good booster (2xAA => 3.3V) or a step-down-regulator (3xAA => 3.3V) ?

Greetings

Andreas

How about this? http://www.ti.com/product/TPS82740B/description&lpos=Middle_Container&lid=Alternative_Devices