General Description

The AAT1130 SwitchReg™ is a member of Skyworks Total Power Management IC™ product family. The converter uses a predictive on-time, current-mode step-down control scheme that provides a fixed 2.5MHz switching frequency (under steady state conditions). It allows the control circuit to react nearly instantly in order to improve transient response and to enhance stability with the LC components as small as 1.0μH. The unique architecture improves transient response while allowing tiny passive LC filter components. The high switching frequency (up to 2.5MHz) keeps output voltage ripple low.

Features

• 2.5MHz Switching Frequency

• Fast Transient Response with Small LC Output Filter Components

• Input Voltage Range: 2.7V to 5.5V

• Output Voltage Range: 0.6V to 1.8V

• High 92 Peak Efficiency (VIN = 3.6V, VOUT = 1.8V)

• Low 60μA Quiescent Current

• 400mA Maximum Continuous Output Current

• Internal 150μs Soft-Start Feedback Ramp

• Over-Temperature Protection

• Anti-Ringing Switch to Reduce EMI During Discontinuous Conduction Mode Operation

• Valley Current Limit Protection

• SC70JW-10 Package

• -40°C to 85°C Temperature Range

Applications

• Microprocessor/DSP Core and I/O

• Mobile Phones

• PDAs and Handheld Computers

• Digital Cameras

• Portable Music Players

• Handheld Games

• Handheld Instruments