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ON Semiconductor


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


  • Input-voltage range: 2.5V to 24V
  • ±2% load and line accuracy
  • Stable with small 1μF ceramic capacitor
  • 150°C maximum junction temperature
  • Active discharge function for fast turn-off
  • Soft-start
  • Industrial power supplies
  • Power tools
  • Multi-cell batteries
  • Smart meters
  • Low-power wireless networking equipment
  • LED dimming circuits
  • Wireless chargers


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