微源半导体 LP3990A DFN4(1*1) 300mA、超低噪声、小封装、超快CMOS LDO稳压器

General description

The LP3990A is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3990A performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current.

The LP3990A also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.

The LP3990A consumes less than 1μA 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 1mm × 1mm TDFN-4packages.

Features

◆ Ultra-thin Package

◆ 2.5V- 5.5V Input Voltage Range

◆ Low Dropout : 240mV @ 300mA

◆ 1.2V, 1.5V, 1.8V, 2.5V, 2.8V,3.0V,3.3V and 5V Fixed

◆ 300mA Output Current, 450mA Peak Curren

◆ High PSRR:-75dB at 1KHz

◆ 1uA Standby Current When Shutdown

◆ Available in 1mm×1mm TDFN-4 Package

◆ TTL-Logic-Controlled Shutdown Input

◆ Ultra-Fast Response in Line/Load transient

◆ Current Limiting and Thermal Shutdown Protection

◆ Quick start-up (typically 50uS)

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