DATA SHEET AAT3218 TM 150mA MicroPower High Performance LDO General Description Features The AAT3218 MicroPower low dropout linear regulator is Low Dropout: 200mV at 150mA ideally suited for portable applications where very fast Guaranteed 150mA Output transient response, extended battery life, and small size High Accuracy: 1.5% are critical. The AAT3218 has been specifically designed 70A Quiescent Current for high-speed turn-on and turn-off performance, fast Fast Line and Load Transient Response transient response, and good power supply ripple rejec- High-Speed Device Turn-On and Shutdown tion (PSRR), and is reasonably low noise, making it ideal High Power Supply Ripple Rejection for powering sensitive circuits with fast switching require- Low Self Noise ments. Short-Circuit and Over-Temperature Protection Uses Low Equivalent Series Resistance (ESR) Ceramic Other features include low quiescent current, typically Capacitors 70A, and low dropout voltage, typically less than Output Noise Reduction Bypass Capacitor 200mV at the maximum output current level of 150mA. Shutdown Mode for Longer Battery Life The device is output short-circuit protected and has a Low Temperature Coefficient thermal shutdown circuit for additional protection under 5 Factory-Programmed Output Voltages extreme operating conditions. SOT23 5-Pin or SC70JW 8-Pin Package The AAT3218 also features a low-power shutdown mode for extended battery life. A reference bypass pin has Applications been provided to improve PSRR performance and output noise, by connecting a small external capacitor from Bluetooth Headsets device reference output to ground. Cellular Phones Digital Cameras The AAT3218 is available in a Pb-free, space-saving Notebook Computers 5-pin SOT23 or 8-pin SC70JW package in 5 factory- Personal Portable Electronics programmed voltages: 1.2V, 2.3V, 2.8V, 2.85V, or 3.5V. Portable Communication Devices Typical Application V V IN OUT IN OUT AAT3218 BYP ON/OFF EN GND 1F 10nF 2.2F GND GND Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 202249A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. August 7, 2012 DI SC O N TI N U E DDATA SHEET AAT3218 TM 150mA MicroPower High Performance LDO Pin Descriptions Pin Number SOT23-5 SC70JW-8 Symbol Function 1 5, 6 IN Input voltage pin should be decoupled with 1F or greater capacitor. 2 8 GND Ground connection pin. Enable pin this pin should not be left floating. When pulled low , the PMOS pass transis- 3 7 EN tor turns off and all internal circuitry enters low-power mode, consuming less than 1A. Bypass capacitor connection to improve AC ripple rejection, connect a 10nF capacitor to 4 1 BYP GND. This will also provide a soft-start function. 5 2, 3, 4 OUT Output pin should be decoupled with 2.2F ceramic capacitor. Pin Configuration SOT23-5 SC70JW-8 (Top View) (Top View) 1 5 1 8 IN OUT GND BYP 2 7 OUT EN 2 GND 3 6 OUT IN 45 OUT IN 3 4 EN BYP Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 202249A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. August 7, 2012 DI SC O N TI N U E D