DATA SHEET AAT2522 Dual High-Current, Low-Noise, Step-Down Regulator General Description Features The AAT2522 is a SwitchReg, dual, high-current, step- Dual 3.0A Peak Output Current Regulators down converter with an input voltage range of 2.7V to 2.7V to 5.5V Input Voltage Range 5.5V and an adjustable output voltage from 0.6V to V . Adjustable Output Voltage (0.6V to V ) IN IN The 1.4MHz switching frequency enables the use of small 100% Duty-Cycle, Low-Dropout Operation external components. The compact footprint and high Integrated 120m High-Side Power MOSFET efficiency make the AAT2522 an ideal choice for portable Integrated 85m Low-Side Power MOSFET applications. Low Noise Light Load Mode No External Compensation Required The AAT2522 delivers load currents up to 3.0A maximum Very Low 90A No-Load Operating Current output current per regulator. Ultra-low R integrated DS(ON) <1A Shutdown Current MOSFETs and 100% duty cycle operation make the Up to 95% Efficiency AAT2522 an ideal choice for high output-voltage, high 1.4MHz Switching Frequency current applications which require a low dropout thresh- Overload and Short-Circuit Protection old. Over-Temperature Protection The AAT2522 provides excellent transient response and Internal Voltage Ramped Soft-Start high output accuracy across the operating range. The Temperature Range: -40C to +85C AAT2522s unique architecture requires no external com- 16-pin 3mm x 4mm TDFN Package pensation components, and produces reduced ripple and spectral noise. Over-temperature and short-circuit pro- Applications tection safeguard the AAT2522 and system components from damage. Digital Cameras and Camcorders Netbooks and Nettops The AAT2522 is available in a Pb-free, space-saving Portable DVD and Media Devices 16-pin 3mm x 4mm TDFN package. The product is rated Power-Over-Ethernet over an operating temperature range of -40C to +85C. Set-Top Boxes Typical Application V OUT1 V IN 0.6V to V IN 2.7V to 5.5V IN1 LX1 VCC1 FB1 PGND1 AGND1 EN1 ON/OFF V OUT2 AAT2522 0.6V to V IN IN2 LX2 VCC2 FB2 PGND2 AGND2 ON/OFF EN2 EP Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 202032A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. June 8, 2012 DATA SHEET AAT2522 Dual High-Current, Low-Noise, Step-Down Regulator Pin Descriptions Pin Name Function 1 VCC2 Bias supply input for regulator 2. Enable input for regulator 2. A logic high enables the second regulator of the AAT2522. A logic 2 EN2 low forces regulator 2 into shutdown mode, placing the second output into a high-impedance state and reducing the VCC2 quiescent current to less than 1A. 3 IN2 Power supply input for regulator 2. Enable input for regulator 1. A logic high enables the primary regulator of the AAT2522. A logic 4 EN1 low forces regulator 1 into shutdown mode, placing the primary output into a high-impedance state and reducing the VCC1 quiescent current to less than 1A. 5 VCC1 Bias supply input for regulator 1. 6-7 IN1 Power supply input for regulator 1. Inductor switching node for regulator 1. LX1 is the drain of the internal high-side P-channel and 8 LX1 low-side N-channel MOSFETs. Externally connected to the power inductor as shown in theTypical Applicatio drawing on page 1 of this datasheet. Power ground for regulator 1. PGND1 is internally connected to the source of the internal low-side 9-10 PGND1 N-channel MOSFET. Feedback input for regulator 1. FB1 senses the output voltage for regulation control. Connect a 11 FB1 resistive divider network from the output to FB1 to AGND1 to set the output voltage accordingly. The FB1 regulation threshold is 0.8V. Analog ground for regulator 1. AGND1 is internally connected to the analog ground of the control 12 AGND1 circuitry. Inductor switching node for regulator 2. LX2 is the drain of the internal high-side P-channel and 13 LX2 low-side N-channel MOSFETs. Externally connected to the power inductor as shown in theTypical Applicatio drawing on page 1 of this datasheet. Power ground for regulator 2. PGND2 is internally connected to the source of the internal low-side 14 PGND2 N-channel MOSFET. Feedback input for regulator 2. FB2 senses the output voltage for regulation control. Connect a 15 FB2 resistive divider network from the output to FB2 to AGND2 to set the output voltage accordingly. The FB2 regulation threshold is 0.6V. Analog ground for regulator 2. AGND2 is internally connected to the analog ground of the control 16 AGND2 circuitry. EP AGND Substrate analog ground. Pin Configuration TDFN34-16 (Top View) 1 16 AGND2 VCC2 2 15 EN2 FB2 3 14 IN2 PGND2 4 13 EN1 LX2 AGND 5 12 AGND1 VCC1 6 11 FB1 IN1 7 10 IN1 PGND1 8 9 LX1 PGND1 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 202032A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. June 8, 2012