General Description
The AAT3218 MicroPower low dropout linear regulator is ideally suited for portable applications where very fast transient response, extended battery life, and small size are critical. The AAT3218 has been specifically designed for high-speed turn-on and turnoff performance, fast transient response, and good power supply ripple rejection (PSRR), and is reasonably low noise, making it ideal for powering sensitive circuits with fast switching requirements.

Features
• Low Dropout: 200mV at 150mA
• Guaranteed 150mA Output
• High Accuracy: ±1.5%
• 70µA Quiescent Current
• Fast Line and Load Transient Response
• High-Speed Device Turn-On and Shutdown
• High Power Supply Ripple Rejection
• Low Self Noise
• Short-Circuit and Over-Temperature Protection
• Uses Low Equivalent Series Resistance (ESR) Ceramic Capacitors
• Output Noise Reduction Bypass Capacitor
• Shutdown Mode for Longer Battery Life
• Low Temperature Coefficient
• 16 Factory-Programmed Output Voltages
• SOT23 5-Pin or SC70JW 8-Pin Package

Applications
• Bluetooth™ Headsets
• Cellular Phones
• Digital Cameras
• Notebook Computers
• Personal Portable Electronics
• Portable Communication Devices