6V Voltage Regulator Circuit
6V Voltage Regulator Circuit
(OP)
Hello -
Wondering if anyone has any information or help with this circuit. I have a variable input of 10-20VDC. I would like to regulate this down to 6VDC with a max of 1amp draw. This load on the system fluctutes. I have tried a 7806 but I am getting 10VDC out when I test the circuit with a 12VDC power supply attached to the imput. It gets very hot even with no load on the system. Any Ideas on what I can do to regulate this to the 6V with a fluctuating or constant input.
Any help would be great
Wondering if anyone has any information or help with this circuit. I have a variable input of 10-20VDC. I would like to regulate this down to 6VDC with a max of 1amp draw. This load on the system fluctutes. I have tried a 7806 but I am getting 10VDC out when I test the circuit with a 12VDC power supply attached to the imput. It gets very hot even with no load on the system. Any Ideas on what I can do to regulate this to the 6V with a fluctuating or constant input.
Any help would be great





RE: 6V Voltage Regulator Circuit
Check that you have connected it up correctly.
It sounds like you have the terminals mixed up, which is very easy to do with some packages.
What package is the 7806 in?
78 series regulators require bypass capacitors to ensure stability (not oscillating).
The 78xx datasheet shows a 0.33uF capacitor on the input and a 0.1uF capacitor on the output.
A 10uF 10V electrolytic on the output will also help.
rgds
Zeit.
RE: 6V Voltage Regulator Circuit
Rob
RE: 6V Voltage Regulator Circuit
The hot IC without any load sounds like either oscillation or incorrect connection. Good advice above re. capacitors local to regulator IC.
RE: 6V Voltage Regulator Circuit
RE: 6V Voltage Regulator Circuit
You may want to check at the "Simple Switchers" made by National Semiconductor, The LM2676 would fit you bill nicely, would just get warm to a finger touch, and is not so complicated to build. The web site provides temperature simulation, and even a list of components to make your switcher, as per your design parameters. The temperature simulation even shows a PCB layout. I've been using it several times: it works! It will probably end up being smaller than your linear and its heat sink.