Question: I'm a co-op student working on a hardware design for an industry client, and I'm trying to use a [TPS63000](http://www.ti.com/lit/ds/symlink/tps63000-q1.pdf) to get a Vout of 3.45V. Vin is 5V. When I power this circuit up, I read 5V on Vin but only 0.7V from Vout. [![TPS63000 Application Circuit](https://i.stack.imgur.com/vQ9VR.png)](https://i.stack.imgur.com/vQ9VR.png)

Here's the PCB design:
[![PCB design](https://i.stack.imgur.com/gjGLL.png)](https://i.stack.imgur.com/gjGLL.png)

I'm not sure what approach to take in troubleshooting this. Any help would be appreciated.

EDIT: Unfortunately I don't have easy access to an oscilloscope, but when I do, I will definitely try to confirm that there's a pulse across the inductor.
Yesterday I assembled another PCB, and I'm getting a very similar result. Vout actually stabilizes at 322mV, and does so with a high degree to accuracy. During startup, I do see Vout shift drastically, but always settles around 322mV. Sorry that that's not very much to go on, an oscilloscope will definitely help give a better picture. 

So it seems to me possible causes are: A. lack of R3/C3 on the Vin pin, B. narrow traces on the PCB, or C. bad chip. Thanks for all the responses so far.

Answer: 
You have no delay on the VINA, EN and PS/SYNC pins. It is unclear what mode the thing will go into when connected like that.

The [device specs](http://www.ti.com/lit/ds/symlink/tps63000.pdf) shows a suitable delay circuit.
[![enter image description here](https://i.stack.imgur.com/u3P2M.png)](https://i.stack.imgur.com/u3P2M.png)
My guess is that you don't have a proper power supply bypassing. You have omitted the separate bypass cap C3 from the typical application schematics, where R3 & C3 form a low-pass filter to separate the power supply of the power part from the controller part of the IC. You might be able to succeed without R3 (but you shouldn't), but you definitely need C3, and the controller side power supply should be separated enough (with at least a thin wire) so that the highly fluctuating current between C1 & the power side of the IC (pin 5) does not affect the controller side power supply of the IC (pin 8).

You should also look at page 16 in the data sheet and read the layout recommendations (note that the layout recommendation picture shows a differing schematics, with a different C3).