You asked: How do I choose a capacitor for a voltage regulator?

What voltage capacitor should I use?

The voltage on a capacitor is not the rating, but rather how much voltage you can expose the capacitor to. For example, if your voltage source is 9 volts, you should choose a capacitor that is at least double the voltage, 18 volts or even 27 volts to be safe.

Are capacitors needed with voltage regulator?

3 Answers. Most voltage regulators (especially LDO types) require a capacitor on the output for stability, and it will usually improve transient response even for regulators like the 7800 that may not strictly require it. An input capacitor is usually required to reduce source impedance.

How do I choose the right capacitor for my power supply?

Do not choose a capacitor based just on the value/voltage combination. Consider the required dv/dt rating when selecting snubber capacitors. The dissipation factor determines the power dissipation within the capacitor. Therefore, select an alternative that offers a lower loss factor.

How do I choose the right size capacitor?

You mainly need to look at 2 values: the voltage and the capacity -both are written on most capacitors-. For example, if you are going to charge a capacitor with 24V, you need to make sure your capacitor will support that voltage; so you’ll need a capacitor for at least 25V (plus error margin).

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Can I use a different uF capacitor?

A capacitor is an energy storage device used to regulate voltage output. A capacitor has two different measures or “ratings.” The first is the capacitance rating, measured in microfarads and listed on the capacitor as uF. … For example, if your capacitor reads “470uF 25v,” it can hold 470 micro-farads at 25 volts.

Can I use a 50v capacitor instead of a 25v?

Yes. Just don’t go below 25v. The 4.7uF is an “exact” value, whereas the 25v is a maximum rating. Probably yes: Ideally you should replace the capacitor with one of the same nominal capacitance and an equal or greater maximum voltage rating.

How do you determine the voltage rating of a capacitor?

Capacitor voltage rating = DC volts + AC component / Kfactor.

  1. Capacitor voltage rating = DC volts + AC component / Kfactor.
  2. Kfactor is dependant on frequency and
  3. For polypropylene K ~~= 1.16 – 0.16 x log(f) (Numerical values were correct.