DESCRIPTION

The A6318 is a high performance linear voltage regulator with adjustable output with a 1.23 reference voltage. It operates from an input of 2V to 6V and provides output current up to 300mA with two external resistors to set the output voltage. The A6318 designed for portable RF and wireless applications with demanding performance and space requirements. Optimized for battery-powered systems to deliver ultra-low noise and low quiescent current. A noise FB pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life.

The A6318 works with low-ESR ceramic capacitors, reducing the PCB space. The A6318 consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs.

The A6318 has superior regulation over variations in line and load. Also it provides fast respond to step changes in load. Other features include over-current and over-temperature protection and high ripple rejection ratio.

The A6318 is available in SOT-25 package

FEATURES

? Low Dropout:210mV@300mA

? TTL-logic-Controlled Shutdown Input

? <0.01μA Standby Current When Shutdown

? Ultra-low noise for RF Application

? Ultra-Fast Response in Line/Load Transient

? Quick Start-Up (Typically 50μS)

? Wide Operating Voltage Ranges: 2V to 6V

? Low Temperature Coefficient

? Current Limiting Protection

? Thermal Shutdown Protection

? Only 1μF Output Capacitor Required for Stability

? High Power Supply Rejection Ratio

? Fast output discharge

? Available in SOT 2 5 p a ckage

APPLICATION

? Battery-Powered Equipment

? Cellular and Smart Phones

? Graphic Card, Laptop, Palmtops, Notebook Computers

? Hand-Held Instruments

? Peripheral Cards

? PCMCIA Card