General Description
The AAT1155 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 2.5A with an internal power MOSFET, the current-mode controlled IC provides high efficiency. Fully internally compensated, the AAT1155 simplifies system design and lowers external part count.

FEATUREs
• 5.5V max supply input
• -40 to 85°C Temperature Range
• Fixed output voltage: 1.0V - 4.2V
• 2.5A output current
• Integrated low on resistance power switches
• Internally compensated current mode control
• 1MHz switching frequency
• Fixed or adjustable VOUT: 1.0 to 4.2V
• Constant PWM mode
• Low output ripple with light load
• Internal softstart
• Current limit protection
• Over-Temperature protection
• MSOP-8 package
• Up to 95% efficiency

APPLICATIONs
• Computer Peripherals
• Set Top Boxes
• Network Cards
• Cable/DSL Modems
• High efficiency conversion from 5V or 3.3V supply