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A voltage regulator is an analog circuit that produces a stable output voltage that doesn't vary with input voltage or load changes. Switching regulators are much more efficient than linear ones.

3
votes
You could do it, for just a few milliamps, with two zeners and a resistor. If you did it this way you could probably get away with a 1206 SMD resistor (0.5W) and a dual series SOT23 zener, in total s …
answered May 2 '11 by Thomas O
1
vote
3answers
I need a voltage regulator for a project which will handle a voltage on its output pin with no input. (The GND pin may still be connected.) Most devices don't seem to be able to handle this. Are there …
asked Apr 30 '11 by Thomas O
1
vote
The MCP1703 has a typical ground current of 2 µA, drop-out of 625 mV and is available in a 4 V version.
answered Jun 18 '11 by Thomas O
5
votes
You can replace them with any equivalent regulator, so long as it is better in terms of current rating and in the same package. For example, don't replace a 79M12 with a 79L12, because the M indicat …
answered Nov 8 '10 by Thomas O
5
votes
One way to ensure a minimum load is to make sure the feedback network draws the minimum load. For example 240 ohms and 75 ohms gives a 5.25V output and draws 16mA. Tweak the resistors to get it perfec …
answered Mar 24 '11 by Thomas O
1
vote
It's unlikely to do any harm. My reasoning: You have a 20C LiPo. That means it is capable of outputting 20x its capacity (3Ah) in amps. So you could draw up to 60A from it with no ill effects. In ord …
answered Jul 5 '11 by Thomas O
3
votes
If you do this with a single battery, you will probably be fine. But if you decide to move it to a car, you must be very careful of load dumps. If you are using your synth in your car and you turn the …
answered May 5 '11 by Thomas O
3
votes
1answer
For a project, I need a 500mV reference. Some requirements: Relatively low cost. Small size. Preferably surface mount. Supply from 4.8V to 25V. Accuracy ±5% or better Stable over voltage (that is, …
asked Oct 15 '10 by Thomas O
3
votes
4answers
Any ideas on how to get 3.3V from 5V - 35V at a low 10mA current level? 3.3V need not be precise. It can be 3.5V or 3V, it is powering a small microcontroller. I'm looking for a small and cost effec …
asked Nov 10 '10 by Thomas O
7
votes
First, why would you do this? The 7805 will be perfectly fine with 12V. If you're passing a lot of current, use a heatsink. The diodes will only move power loss from the regulator to the diodes themse …
answered Nov 1 '10 by Thomas O
7
votes
4answers
In Electronics A2 (GCE), we are currently studying voltage regulators. An example voltage regulator circuit is provided using an op-amp and a power MOSFET. I would judge this to be a voltage follo …
asked May 4 '12 by Thomas O
9
votes
7answers
I want to use a linear regulator for some application, it's in a SOT-223 (not SOT-89) package. How do I keep it cool, preferably without a bulky heatsink? The regulator may be dissipating 2-3W of heat …
asked Oct 30 '10 by Thomas O
2
votes
You didn't provide any specs on how small you want to go but you could consider an op-amp as a voltage regulator with a small pass transistor and LPF for the reference. Or, you could look for programm …
answered Dec 10 '10 by Thomas O
4
votes
6answers
I'm using an LM317T to regulate 5 V to 3.38 V for a microcontroller. R1 is 330 ohms and R2 is 560 ohms. There isn't any input capacitor and the output capacitor is 470 µF 25V, because I had that value …
asked Oct 27 '10 by Thomas O
2
votes
3answers
I've developed a circuit for my model aircraft, which requires 3.3V @ 100mA. My aircraft uses a 3S LiPoly, which ranges from 9V - 12.6V. When the motor is off, the 3.3V supply is good; very low ripple …
asked Oct 3 '11 by Thomas O

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