LP3987-2.7B5C Datasheet - Lowpower Semiconductor inc

General Description
   The LP3987 is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3987 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 LP3987 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. 

FEATUREs
✦ Ultra-Low-Noise for RF Application
✦ 2.5V- 6V Input Voltage Range
✦ Low Dropout : 220mV @ 300mA
✦ High PSSR:-80dB at 1KHz
✦ < 0.01 A Standby Current When Shutdown
✦ TTL-Logic-Controlled Shutdown Input
✦ Custom Voltage Available
✦ Ultra-Fast Response in Line/Load Transient
✦ Quick Start-Up (Typically 50 s)
✦ Current Limiting and Thermal Shutdown Protection

APPLICATIONs
✧ PMP/PDA/MP3 players
✧ Cellular and Mobile phone
✧ RF Module
✧ Sensor Module