AAT1154

1MHz 3A Buck DC/DC Converter General Description The AAT1154 SwitchReg™ is a member of AnalogicTech™'s Total Power Management™ IC product family. The Step-down switching converter is ideal for applications where high efficiency, small size, and low ripple are critical. Able to deliver 3A with an internal power MOSFET, the current-mode controlled IC provides high efficiency. Fully internally compensated, the AAT1154 simplifies system design and lowers external part count. The AAT1154 is available in an SOP-8 package, rated over -40 to 85°C. AAT1154 Features SwitchReg™ VIN Range: 2.7-5.5Volts Fixed or adjustable VOUT: 1.0V - 4.2V 3A output current Up to 95% efficiency Integrated low on resistance power switch Internally compensated current mode control 1MHz switching frequency Constant PWM mode Low output ripple with light load Internal softstart Current limit protection Over-Temperature protection SOP-8 package -40 to 85°C Temperature Range Preliminary Information Applications Computer Peripherals Set Top Boxes Network Cards Cable/DSL Modems High efficiency conversion from 5V or 3.3V supply Typical Application INPUT VP FB 10µF 100Ω AAT1154 VCC LX 1.5µH ENABLE 0.1µF GND OUTPUT 120µF 1154.2003.08.0.91 1 1MHz 3A Buck DC/DC Converter Pin Descriptions Pin # 1 AAT1154 Symbol FB Function Feedback input pin. This pin must be connected to the converter’s output. It is used to set the output of the converter to regulate to the desir...