The LP3983S is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3983S performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The LP3983S also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3983S consumes less than 0.01µA in shutdown mode and has fast turn-on time less than 50µs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. It is available in SOT23-5 packages.

 

 Ultra-Low-Noise for RF Application

 2V- 6V Input Voltage Range

 Low Dropout : 210mV @ 300mA

 300mA Output Current, 550mA Peak Current

 High PSRR: -70dB at 217Hz

 < 0.1uA Standby Current When Shutdown

 Available in SOT23-5 Package

 Current Limiting and Thermal Shutdown Prote