Hello
I'm making a robot, for that i need various power supplies.
The problem is my battery is of 15 volts and I need a 3.3 power supply for a part (although I need many more levels but, they are working fine except 3.3) , for that i used AMS1117 3.3 voltage regulator combined with LM7809 as AMS1117 can only take upto 12 volts only. But a lot of heat is being produced as soon as I apply load on the regulator. Current from the IC is around 250mA (which is not a sufficient reason for this much heat). I do not know much about the internal circuits of these ICs. Also it gives 3.3 voltage at no load.
Please help, suggest a better circuit or the cause of the heat production from the regulator..
Feel free to ask for any further details..
I'm making a robot, for that i need various power supplies.
The problem is my battery is of 15 volts and I need a 3.3 power supply for a part (although I need many more levels but, they are working fine except 3.3) , for that i used AMS1117 3.3 voltage regulator combined with LM7809 as AMS1117 can only take upto 12 volts only. But a lot of heat is being produced as soon as I apply load on the regulator. Current from the IC is around 250mA (which is not a sufficient reason for this much heat). I do not know much about the internal circuits of these ICs. Also it gives 3.3 voltage at no load.
Please help, suggest a better circuit or the cause of the heat production from the regulator..
Feel free to ask for any further details..