Appropriate surface mount dc to dc converter?

[boylesg]

I am after an appropriate dc to dc converter for the purpose of making a gps pet collar.

I am planning to make a prototype with an arduino mini so I need a component whose associated other components are no bigger than one of these.

I would imagine a device capable of supplying a couple of hundred mA would be adequate.

I am familiar with LM2576 but this device would be overkill for such a project and too big with its associated components.

Any suggestions?

Preferably a device that is not so small that soldering it with a regular soldering iron is impossible.

 

[KlausST]

Hi,

I recommended this so often:
There are many manufacturers of DCDC conversion IC.
Because they are interested in selling their products they help to choose the right part with interactive online selection guides.

One of them is LT...just as an example (without saying LT is better or worse than other manufacturers)
https://www.linear.com/products/switching_regulator

Usually those regulators with higher switching frequency need smaller inductors.
But they need more careful pcb layout design, and maybe they have higher current consumption at lower loads.

Klaus

 

[tomerbr]

What will be the input voltage to the converter? if it not not much higher than the 5V Arduino input maybe you ca use a regulator.

 

[BrunoARG]

Hello,

I suppose your supply will be around 9V as it's a quite small power supply. However, it won't even exceed 30V, I think.

Have you tried MC34063? Take a look at this datasheet MC34063A It can found in SOIC8 package, pretty small and easy to solder.

You will find the schematic and values in that link. Maybe some modifications could be done to increase efficieny as it's a battery powered device.

Hope being useful.

 

[tomerbr]

Hi,

you can use TI webench https://www.ti.com/lsds/ti/analog/webench/overview.page?DCMP=analog_power_mr&HQS=webench-pr
It is an online tool to help design DC convertors, it has parts selection option and you can input the required parameters to narrow the selection.
It also shows a suggested pcb layout so you can estimate the final size of the board.