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产品信息
LP3987H-18B5F
The LP3987H is designed for portable RF and wireless applications with demanding performance and space requirements.
The LP3987H 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 LP3987H also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.
The LP3987H consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 20μs. 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.
Features
Ultra-Low-Noise for RF Application
2.5V- 6.0V Input Voltage Range
Low Dropout : 360mV @ 600mA
High PSSR:-65dB at 1KHz
< 0.01uA Standby Current When Shutdown
Ultra-Fast Response in Line/Load transient
Current Limiting and Thermal Shutdown Protection
该LP3987H是专为便携式射频和无线应用与苛刻的性能和空间要求。
该LP3987H性能优化电池供电系统，以提供超低噪音和低静态电流。稳压器的接地电流只会略微增加，
进一步延长电池寿命。
LP3987H也适用于低ESR陶瓷电容器，减少电力应用所需的电路板空间，在手持无线设备中至关重要。
LP3987H消耗小于0.01μA处于关闭模式，快速开启时间小于20秒μs。其他特点包括超低的压降，高输出精度，
限流保护，纹波抑制率高。它有SOT23-5封装的5引线。
特征
射频应用的超低噪声
2.5V-6.0V输入电压范围
低压差：360mV@600mA
高PSSR:1KHz时-65dB
< 停机时0.01uA备用电流
线路/负载瞬态中的超快速响应
限流和热停堆保护
