General Description

The AS1358/AS1359 are ultra-low-noise, low-dropout linear regulators specifically designed to deliver up to 150/300mA continuous output current, and can achieve a low 140mV dropout for 300mA load current. The LDOs are designed and optimized to work with low-cost, small capacitance ceramic capacitors.

Key Features

Preset Output Voltages: 1.5 to 4.5V (in 50mV steps)

Output Noise: 9µVRMS @ 100Hz to 100kHz

Power-Supply Rejection Ratio: 92dB @ 1kHz

Low Dropout: 140mV @ 300mA Load

Stable with 1µF Ceramic Capacitor for any Load

Guaranteed 150/300mA Output

1.25V Internal Reference

Extremely-Low Quiescent Current: 40µA

Excellent Load/Line Transient

Overcurrent and Thermal Protection

TSOT23 5-pin Package

Applications

The devices are ideal for mobile phones, wireless phones, PDAs, handheld computers, mobile phone base stations, Bluetooth portable radios and accessories, wireless LANs, digital cameras, personal audio devices, and any other portable, battery-powered application.