What is the quiescent current of an LDO?

Figure 1 Quiescent current
Figure 1 Quiescent current

Quiescent current (IB) is the current consumed by the internal control circuitry of an LDO when it is active. Quiescent current is defined as the current flowing from the GND terminal. The datasheets show a value under a zero-load condition (IOUT=0 A) at the specified input voltage (VIN), bias voltage (VBIAS), and temperature. LDOs with low quiescent current are suitable for battery-operated mobile applications.

Figure 2 Example of an IB-VIN curve
Figure 2 Example of an IB-VIN curve

Please also refer to the following documents for related explanations.

Application note

To product list of LDO ICs :

Main web page about LDO ICs:

Otherinformation

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