PCB heat up

[robertferanec]

1A continuous current * 7V difference between Input and output = 7W power (7W of heat on the regulator)

You will need a good heatsink on the regulator to take away 7W (I dont think you can take this away just with PCB). As Paul van Avesaath and Lakshmi suggested, I would go for a switching power supply. Linear regulators are not good when used in applications where input - output voltage and output currents are high.

PS: Especially, when you are creating battery powered application, the 7W is wasted power - you will be discharging battery without actually using half of the energy.

[Mahsheed]

Are you suggesting Buck converter?

[Mahsheed]

I dont think you can take this away just with PCB

Does that mean the Heat sink pad on PCB wont do in case of SMD and only through hole with good heat sink would do the work. Right?

[Paul van Avesaath]

have a look at somtething like this

http://www.ti.com/product/LMZ23603

just as easy as an LDO

also take into account your car battery is 12V but when the car is running it is being charged at +/- 14.4 V.. so your input voltage is higher..

[robertferanec]

Does that mean the Heat sink pad on PCB wont do in case of SMD and only through hole with good heat sink would do the work. Right?

- yes, but this it not the point. The important point is, that all the heat is wasted energy which you can safe by using a switching power supply regulator.

[Mahsheed]

Okay. Thank you very much. Let me have a look at that. If I find any issue, I will ask here again :P

[Mahsheed]

Hi robertferanec,
I have studied the LMZ23603TZX and that is exactly what I need for my design. But I have a problem. It costs 8.8 USD/PSC. So, can you please suggest me some other substitute (similar to LMZ23603TZX) whose cost is low?

[robertferanec]

Normally I would just go for example to TI website and search for the chip I need. For example like this: http://www.ti.com/power-management/n.../products.html

[Mahsheed]

Thank you very much sir. I found LM2596S and that is working perfectly fine for this.

[Paul van Avesaath]

Hi robertferanec,
I have studied the LMZ23603TZX and that is exactly what I need for my design. But I have a problem. It costs 8.8 USD/PSC. So, can you please suggest me some other substitute (similar to LMZ23603TZX) whose cost is low?

you could try and ask for samples