The NCP718 from ON Semiconductor is a Low Dropout (LDO) linear regulator which produces a maximum output current of 300mA from an input of up to 24V.
A stable and accurate device, the NCP718 typically draws a very low quiescent current of 4μA over the full operating-temperature range. A choice of fixed output voltages is offered in 100mV increments between 1.2V and 5.0V. ON Semiconductor also supplies an adjustable-voltage version providing an output between 1.2V and 5.0V.
The NCP718 is well suited to use in the power circuit for RF and sensor circuits because of its high power-supply rejection ratio of 60dB and its low-noise performance, typically 36μVRMS from 100Hz to 100kHz.
The regulator incorporates several protection features, including thermal shut-down and current limiting. For low-power applications such as smoke detectors and proximity sensors, the NCP718 is supplied in a TSOP-5 package. For applications operating at higher pulsed or continuous power levels, it is provided in a 2mm x 2mm WDFN-6 package.
NCP718 LDO: 60dB power-supply rejection ratio