DC/DC Step up for powering a solenoid , suggestions?

Hi
you can select TPS61089 for this application. the minimum voltage of a Li-poly battery is 3.3V~3V, so the input current reach 3.9A level if VOUT=9 and IOUT=1.3A. It is not over design using TPS61089.
the Li-poly battery should be OK to support 2C output current, which is 4A for a 2Ah battery.

Thanks I will try to get a proto pcb made.

Does the output get effected by the size of the capacitor?

Yes.
the output capacitor will impact the stability, ripple and load transient performance. please follow the datasheet to calculate and select proper COUT and compensation resistor and capacitor.

Ok Thank You

Usually the inductor is place in series to the input and output, in this DC-DC it is not that case?

What is the advantage of the integrating switching compared to having an external mosfet, part from component cost and board size?

Is there an online simulation for this DC-DC so that i do not use overkill components?

When the device is disabled, the input voltage will be outputted, instead of the step up voltage. This would also mean the my device connected to the output of DC-DC will still consume some power, even though not a full voltage.

I am thinking about keeping a load switch such as TPS27081ADDCR, but this rated to max 8V, is the anything similar that i can use.

What effect does the Adjustable Switching Frequency have on overall performance?

Is it possible to set the DC-DC so that it does not take to much current which could cause the input voltage to drop below a working voltage for my system?

I will give TPS61089 a try.

I have just prepared a simulation on the website, the simulation would not allow me to go beyond 2A output. 

Would there be a reason for that? I have the pdf attached.webench_design_4921425_7_304135798.pdf

Thank You 

Thanks

But what would happen if i was to connect a device that required current above.

Would there be a simple voltage drop?

I have ordered some samples, i need to order a proto 2 lay board with a design so i can test it out.

Thanks

I need to ask some questions in regards to a H Bridge IC, where would be the best place to ask such questions.

Would it be ok to ask the question here as this DC-DC will be power that device?

I will be making a PCB. I have made my design on the simulation and been recommended some components.

In regards to component selection

Looking at the suggested components if i was to change all 0201 and 0402 to 0603

And keep the large caps of 1206 to 1210. For example 47uF for the input is 1206 and the output is 1210

This way i can keep components to a minimum

Some resisters are also 1206, is this nessary?