Current Regulating Diode

Semiconductor Integrated Circuits (ICs)
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Current Regulating Diodes also are known as CRD. A CRD’s purpose is to maintain a constant flow of current, even when there are voltage fluctuations.

From our home page you may find them this way: Product Index > Integrated Circuits (ICs) > PMIC - Current Regulation/Management

Here is a guideline to filter your options down:

  • Current output.
  • Active and In-stock
  • Mounting type or package.
  • Sensing Method

After these first four, I have found most people have more wiggle room. Things can be tweaked perhaps a larger range for voltage input and operating temperatures. Of course, there are always going to be exceptions to the rules, maybe you need to have the accuracy of the diode at 1%. This will change the filtering order.

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It would be better to call these something other than “diodes” as they are not diodes. Perhaps something like “inline” or “two terminal” current regulators. Incidentally, one can also use an LM317 or similar linear adjustable voltage regulator as a current regulator by inserting a series resistor in the output and tying the adjustment pin to the high side of the load, as shown here in the LM317 datasheet:

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One must have sufficient overhead voltage of at least 3.25V and one must be sure to not exceed the power handling capability of the regulator, which depends on the package type, the circuit board copper area, any heat sinking provided, and the maximum ambient air temperature.