Low-dropout regulator
DC linear voltage regulator / From Wikipedia, the free encyclopedia
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A low-dropout regulator (LDO regulator) is a DC linear voltage regulator that can operate even when the supply voltage is very close to the output voltage.[1] The advantages of an LDO regulator over other DC-to-DC voltage regulators include: the absence of switching noise (in contrast to switching regulators); smaller device size (as neither large inductors nor transformers are needed); and greater design simplicity (usually consists of a reference, an amplifier, and a pass element). The disadvantage is that linear DC regulators must dissipate heat in order to operate.[2]