General Description

The AAT1152 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 is internally compensated for simplified system design and low external parts count.

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Features

• 5.5V Max Supply Input

• Fixed or Adjustable VOUT 1.0V to 4.2V

• 1A Output Current

• Integrated Low On Resistance Power Switches

• Up to 95 Efficiency

• Power-OK Signal

• Internally Compensated Current Mode Control

• High Initial Accuracy: ±1

• 850kHz Switching Frequency

• Constant Pulse Width Modulation (PWM) Mode

• Low Output Ripple with Light Load

• 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