Single-Channel Output

LP3983S-Single Channel
300Output Current(mA):
AdjustableOutput Voltage(V):
90Quiescent Current(uA):
2.0-6.0Input Voltage(V):
220@300Dropout Voltage(mV@mA)(typ):
Shutdown,High PSRRSpecial Features:

300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator

General Description

The LP3983 is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3983 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 LP3983 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3983 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.


Portable Media Players/MP3 players
Cellular and Smart mobile phone
DSC Sensor
Wireless Card



Ultra-Low-Noise for RF Application  
2V- 6.5V Input Voltage Range
Low Dropout : 220mV @ 300mA  
300mA Output Current, 550mA Peak Current
High PSSR:-68dB at 1KHz 
< 0.01uA Standby Current When Shutdown
Available in SOT23-5/6 Package  
TTL-Logic-Controlled Shutdown Input  
Ultra-Fast Response in Line/Load transient  
Current Limiting and Thermal Shutdown
Quick start-up (typically 50uS)

Marking Information

Please see specification. 
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