LP3984裕鼎祥咨询电话：139 2843 4054
LP3984 General Description
The LP3984 is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3984 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 LP3984 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3984 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. Available in the 5-lead of SOT23-5 packages.
LP3984 Features
· Ultra-Low-Noise for RF Application
· 2V- 6.5V Input Voltage Range
· Low Dropout : 220mV @ 300mA
· 1.2V, 1.5V, 1.8V, 2.5V, 2.8V 3.0V and 3.3V Fixed
· 300mA Output Current, 550mA Peak Current
· High PSSR:-73dB at 1KHz
· < 0.01uA Standby Current When Shutdown
· Available in SOT23-5 Package
· TTL-Logic-Controlled Shutdown Input
· Ultra-Fast Response in Line/Load transient
· Current Limiting and Thermal Shutdown Protection
· Quick start-up (typically 50uS)
LP3984 Applications
· Portable Media Players/MP3 players
· Cellular and Smart mobile phone
· LCD
· DSC Sensor
· Wireless Card
