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LDO-Slide3

The main attribute of an LDO regulator is the drop out voltage, which is the difference between input and output voltage that will allow the IC to regulate the output. The smaller the voltage, the better the part is in a battery application because less input voltage is needed to maintain the output. Load current is the amount of current sourced by the LDO, while Quiescent Current (Iq) is a measure of the current consumed by the regulator itself. Iq is an important specification at light loads or in applications that require the LDO to be always on. In addition, load and supply regulation are key specifications. These measure the change in output voltage with the change in input voltage and load conditions.

PTM Published on: 2009-01-20