The NCP623 low dropout linear regulator can deliver up to 150 mA of output current with a typical dropout voltage of 180 mV. This low dropout feature helps to maintain a regulated output voltage for a longer period of time as the lifetime of the battery decreases.
It is the ideal choice for noise sensitive environments like portable applications where noise performance and space are at a premium. The typical output noise voltage specification is 25 μVRMS. The space saving package choices include a Micro8™ or DFN6. An additional noise saving feature of this device is its ability to filter choppy signals on the power supply by providing a typical DC ripple rejection of −90 dB and −70 dB at 1.0 kHz.
The NCP623 is designed to work with very low ESR capacitors such as ceramic capacitors which are common in the industry now. Additional features such as thermal shutdown and short−circuit protection provide for a robust system design.

FEATUREs
• Very Low Quiescent Current 170 μA (ON, no load), 100 nA
   (OFF, no load)
• Very Low Dropout Voltage, Typical Value is 137 mV at an Output
   Current of 100 mA
• Very Low Noise with External Bypass Capacitor (10 nF),
   Typically 25 μVRMS over 100 Hz to 100 kHz
• Internal Thermal Shutdown
• Extremely Tight Line Regulation Typically −90 dB
• Ripple Rejection −70 dB @ 1.0 kHz
• Line Transient Response: 1.0 mV for ΔVin = 3.0 V
• Extremely Tight Load Regulation, Typically 20 mV at ΔIout = 150 mA
• Multiple Output Voltages Available
• Logic Level ON/OFF Control (TTL−CMOS Compatible)
• Output Capacitor ESR Can Vary from 0 Ω to 3.0 Ω
• Pb−Free Packages are Available

APPLICATIONs
• All Portable Systems, Battery Powered Systems, Cellular
   Telephones, Radio Control Systems, Toys and Low Voltage Systems