The LP3983H is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3983H performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The LP3983H also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3983H 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 feedback accuracy, current limiting protection, and high ripple rejection ratio. It is available in the 5-lead of SOT23-5 and SOT89-5 packages.

Applications

 Portable Media Players/MP3 players

 Cellular and Smart mobile phone

 LCD/ DSC Sensor

 Wireless Card

Features

 Ultra-Low-Noise for RF Application

 2.2V- 6V Input Voltage Range

 Low Dropout : 420mV @ 600mA

 600mA Output Current, 750mA Peak Current

 High PSRR: -70dB at 217Hz

 < 0.01uA Standby Current When Shutdown

 Ultra-Fast Response in Line/Load transient

 Current Limiting and Thermal Shutdown Protec