LP3981-Single Channel

产品型号 输出电流(mA) 输出电压(V) 静态电流(uA) 输入电压(V) PSRR(dB) 精度(%) 压差(mV@mA)(typ) 特征 封装 规格书
LP3981 300 1.2/1.3/1.5/1.8/2.5/2.8/3/3.3 45 2-6.5 -76 2 220@300 Shutdown,High PSRR SOT23-5

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

General Description

The LP3981 is designed for portable RF and wireless applications demanding performance and space requirements. The LP3981 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 LP3981 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3981 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 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
1.2V, 1.5V, 1.8V, 2.5V, 2.8V 3.0V and 3.3V Fixed
300mA Output Current, 550mA Peak Current
High PSSR:-76dB 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)

Marking Information


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