Boost converter chips

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minerva
 
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Joined: Sun Dec 06, 2009 11:12 pm

Boost converter chips

Post by minerva »

Does anybody have any recommendations for good boost converter ICs that might suit my criteria, as follows?

- Step up 2.4-3.7V (from dual AAs, or dual 1.2 V NiMH cells, or 3.7 v lithium poly) to 5 V.

- Reasonably high output current, 500 mA at least, preferably a bit higher, 1A max. would be nice, but I could settle for 600-800 mA max. if 1A is impractical.

- I have looked at the LT1302 as used in MintyBoost, this works well, but it's a little bit expensive and I'd like to find something to bring the cost down a little.
http://www.linear.com/docs/Datasheet/lt1302.pdf

- Something that is not $5-$6 for a single IC, if we can help it.

- I have looked at the TI TPS61200, which looks attractive, but its tiny leadless SMD package is very hard to work with.
http://www.ti.com/lit/ds/symlink/tps61200.pdf

- I am comfortable with SMD, I don't completely oppose using SMD, as long as it's not extremely tiny, many-pinned and hard to work with SMD such as the TPS61200.

- I would be happy with a 8-pin SOIC or a SOT23-5.

- I have looked at the Micrel MIC2288, this looks like a very promising candidate IC, with high 1A switcher current capacity and a relatively low price.
http://www.micrel.com/_PDF/mic2288.pdf

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sensor geek
 
Posts: 21
Joined: Mon Nov 28, 2011 2:19 pm

Re: Boost converter chips

Post by sensor geek »

That MIC2288 looks like a nice chip. Too bad it needs an external rectifier, however the required inductor is small enough to make up for that, both in size and cost.

I've been using the MCP1624 for a number of projects and really like that, but it's only good for 175mA. That one has a built-in diode.
http://www.microchip.com/wwwproducts/De ... e=en548193

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