General Description
The AAT1150 SwitchReg™ is a step-down switching converter ideal for applications where high efficiency, small size, and low ripple are critical. Able to deliver 1A with internal power MOSFETs, the current-mode controlled IC provides high efficiency using synchronous rectification. Fully internally compensated, the AAT1150 simplifies system design and lowers external parts count.
The AAT1150 is available in a Pb-free MSOP-8 package and is rated over the -40°C to +85°C temperature range.

FEATUREs
• VIN Range: 2.7V to 5.5V
• Up to 95% Efficiency
• 110mΩ RDS(ON) MOSFET Switch
• <1.0μA of Shutdown Current
• 1MHz Switching Frequency
• Fixed or Adjustable VOUT: 1.0V to 4.2V
• High Initial Accuracy: ±1%
• 1.0A Peak Current
• Integrated Power Switches
• Synchronous Rectification
• Internally Compensated Current Mode Control
• Constant PWM Mode for Low Output Ripple
• Internal Soft Start
• Current Limit Protection
• Over-Temperature Protection
• MSOP-8 package
• -40°C to +85°C Temperature Range

APPLICATIONs
• Cable/DSL Modems
• Computer Peripherals
• High Efficiency Conversion From 5V or 3.3V Supply
• Network Cards
• Set-Top Boxes