i just want to know if i need a regulator 3.3V 150mA, with an input of approx. 6V ?
I thing it's o.k. It doesn't matter, the input voltage will be from 6-10Volt
If you can find this
TOREX - XC6201P332PR it's enough
At the input, yellow dot, you must have the battery voltage. About 4.8-6Volt
So, you can use either this
www.farnell.com/datasheets/578786.pdf or this
www.semiconductorstore.com/pdf/newsite/torex/XC6209F252MR_DS.pdf
The most important is, that you need a very
low drop voltage reugulator