A circuit for a LDO dc-dc converter?

[xkrja]

First post here. I'm a beginner in electronics and is just starting out with arduino development. So, I'll power an arduino board and a stepper driver circuit with a lead ackumulator 6V 12Ah. Stepper uses approx. 1300 mA the Arduino more or less nothing in comparison. Both the stepper and the arduino run at 5V regulated.

I got the suggestion that I use a LDO regulator to output regulated 5V. I found this LDO-regulator (L4940V5 TO-220):

**broken link removed**

The problem is that I'm a beginner and I don't know how the complete regulator circuit might look. I've found some circuits online but none uses this particular regulator and I'm not sure that I can use these circuits. Can anyone point out a circuit that will work with this regulator? It would be awesome if there can be some check for reverse polarity (I mean if I connect + and - wrong the circuit will shutdown).

[EDIT]
Is the "Test circuit" in Figure 1 in the PDF something I can use?

Thanks for help!

 

[abhi_tandon80]

Nothing difficult put IN pin 1 to battery GND pin 3 to ground and your output is ready between pin 2 OUT and GND ,if you want protection just add a diode between pin1 and battery to avoid anything wrong with reverse polarity!!!

 

[xkrja]

Nothing difficult put IN pin 1 to battery GND pin 3 to ground and your output is ready between pin 2 OUT and GND ,if you want protection just add a diode between pin1 and battery to avoid anything wrong with reverse polarity!!!

Thanks for the reply! Well, that sounds easy. In some circuits I've seen a couple of capacitors between V in and gnd and V out and gnd. Aren't they necessary?

 

[abhi_tandon80]

Capacitor has a meaning for Variation in voltage ,spike ,noise your application i don't think so reqiure all these so forget and go ahead