Will this PMIC do the trick?

[Zinglish]

Project power requirement: 1V8 @ 250mA min and 3V3 @ 250mA min with a 3v6 battery and USB charging / powering (5V in) capabilities.

Will this IC do the trick: http://www.linear.com/product/LTC3586-2? Also, would it better to split the work up amongst specialist ICs or is this single IC ok?

[Buriedcode]

That looks ideal for your application, and if anything, overkill.  But if you're just making one, then I'm sure it will do just fine - the extra boost output can be optional.

[Zinglish]

Thanks for the awesome replies! I took at a look at the LP3923 chip (thanks for the great suggestion blueskull) and figured that the LDO currents are probably too low for what I need them for (250mA is minimum for my application and will likely rise to 700mA under heavy load). Is it possible to combine LDOs? I was doing a bit of research on the topic and there's a lot of no-nos around combining 2 separate PMIC LDOs but nothing on combining LDOs from the same PMIC.

After hours of research I also managed to find this bad boy: http://www.ti.com/product/TPS65217 which has 3 bucks @ 1.2A which again is overkill but I'd rather have the power available than have the device starve. It's still quite expensive ranging from $2.5 (batch) - $5 (single) but cheaper than the LT PMIC I mentioned and has plenty of power for the price. It also has a WLED driver and considering I am attaching a 4.3" TFT display this is quite a nifty feature. If I could find something very similar to this (I don't need the 3rd buck and perhaps only need 2 bucks / LDOs @ 1A) but cheaper it would be end game.