500mA Output,Low noise,Low-Dropout CMOS Linear Regulator
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LP3981H
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概述
The LP3981H series low-dropout, low-power regulators offer a fast start-up and excellent line and load transient responses. A low ground current while at no load with chips enabled makes the devices attractive for battery-operate power systems. The LP3981H series also provides an active pull-down circuit to quickly discharge output load. Other features include short current limit, thermal protection and a lowcurrent consume shut-down mode.The LP3981H is available in SOT23-5 packages.
应用
◆Portable Media Players/MP3 players ◆Cellular and Smart mobile phone ◆LCD ◆DSC Sensor ◆Wireless Card
数据参数
数据参数
输出电流(mA)
500
输出电压(V)
1.8/2.5/2.8/3.0/3.3
输入电压(V)
2~6.5
电源抑制比(dB)
-76
精度(%)
2
导通压差(mV/mA)
220 @ 300
静态电流(uA)
45
特点
Shutdown,High PSRR
封装
SOT23-5
特征
特征
◆2.5V~5.5V Input Voltage Range ◆Low Dropout: 260mV @ 300mA ◆500mA Output Current ◆High PSRR: -63dB at 1KHz ◆<0.1uA Standby Current In Shutdown Mode ◆TTL-Logic-Controlled Shutdown Input ◆Ultra-Fast Response in Line/Load transient ◆Current Limit and Thermal Shutdown Protection
