AAT2120IES-0.6-T1 Skyworks

DATA SHEET AAT2120 500mA Low-Noise, Step-Down Converter General Description Features The AAT2120 SwitchReg is a 1.8MHz step-down con- V Range: 2.7V to 5.5V IN verter with an input voltage range of 2.7V to 5.5V and V Range: 0.6V to V OUT IN output as low as 0.6V. Its low supply current, small size, Up to 500mA Output Current and high switching frequency make the AAT2120 the Up to 96% Efficiency ideal choice for portable applications. Low Noise Light Load Mode 45A Typical Quiescent Current The AAT2120 delivers up to 500mA of load current, while 1.8MHz Switching Frequency maintaining a low 45A no load quiescent current. The Soft-Start Control 1.8MHz switching frequency minimizes the size of exter- Over-Temperature and Current Limit Protection nal components, while keeping switching losses low. The 100% Duty Cycle Low-Dropout Operation AAT2120 feedback and control delivers excellent load <1 A Shutdown Current regulation and transient response with a small output Small External Components inductor and capacitor. Ultra-Small STDFN22-8 Package The AAT2120 maintains high efficiency throughout the Temperature Range: -40C to +85C load range. The AAT2120s unique architecture produces reduced ripple and spectral noise. Over-temperature and Applications short-circuit protection safeguard the AAT2120 and sys- tem components from damage. Bluetooth Headsets Cellular Phones The AAT2120 is available in a Pb-free, 8-pin, 2x2mm Digital Cameras STDFN package and is rated over the -40C to +85C Handheld Instruments temperature range. Micro Hard Disk Drive Portable Music Players USB Devices Typical Application V IN V = 1.8V 500mA O AAT2120 L1 VP LX 3.0H R 1 VIN 118k FB EN C 1 4.7F R 2 C 2 59k 4.7F GND PGND Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 202005A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. May 24, 2012 DATA SHEET AAT2120 500mA Low-Noise, Step-Down Converter Pin Descriptions Pin Symbol Function 1 VP Input power pin connected to the source of the P-channel MOSFET. Connect to the input capacitor. 2 VIN Input bias voltage for the converter. 3 GND Non-power signal ground pin. 4 FB Feedback input pin. Connect this pin to an external resistive divider for adjustable output. 5 N/C No connect. 6 EN Enable pin. A logic high enables normal operation. A logic low shuts down the converter. Switching node. Connect the inductor to this pin. It is connected internally to the drain of both high- and 7LX low-side MOSFETs. Input power return pin connected to the source of the N-channel MOSFET. Connect to the output and 8 PGND input capacitor return. EP Exposed paddle (bottom) connect to ground directly beneath the package. Pin Configuration STDFN22-8 (Top View) 1 8 VP PGND 2 7 VIN LX 3 6 GND EN FB 4 5 N/C Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 202005A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. May 24, 2012