Supply original LP3990MF-1.8, PMIC - Voltage Regulators - Linear, by Texas Instruments

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The LP3982 is designed for portable RF and wireless applications with demanding performance and space requirements.
The LP3982 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 LP3982 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.
The LP3982 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 SC-70 packages.
Features◆ Ultra-Low-Noise for RF Application◆ 2V- 6V 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, 550A Peak Current◆ High PSSR:-80dB at 1KHz◆ < 0.01uA Standby Current When Shutdown◆ Available in SC-70-5 Package◆ TTL-Logic-Controlled Shutdown Input◆ Ultra-Fast Response in Line/Load transient◆ Current Limiting and
Thermal Shutdown Protection◆ Quick start-up (typically 50uS)Applications◇ Portable Media Players/MP3 players◇ Cellular and Smart mobile phone◇ LCD◇ DSC Sensor◇ Wireless Card