DESCRIPTION

The IR3473 SupIRBuckTM is an easy‐to‐use, fully integrated and highly efficient DC/DC voltage regulator. The onboard constant on time hysteretic controller and MOSFETs make IR3473 a space‐efficient solution that delivers up to 6A of precisely controlled output voltage.

FEATURES

• Input Voltage Range: 3V to 27V

• Output Voltage Range: 0.5V to 12V

• Continuous 6A Load Capability

• Constant On‐Time Control

• Compensation Loop not Required

• Excellent Efficiency at Very Low Output Currents

• Programmable Switching Frequency and Soft Start

• Thermally Compensated Over Current Protection

• Power Good Output

• Precision Voltage Reference (0.5V, +/‐1)

• Enable Input with Voltage Monitoring Capability

• Pre‐bias Start Up

• Thermal Shut Down

• Under/Over Voltage Fault Protection

• Forced Continuous Conduction Mode Option

• Very Small, Low Profile 4mm x 5mm QFN Package

APPLICATIONS

• Notebook and Desktop Computers

• Consumer Electronics – STB, LCD, TV, Printers

• 12V and 24V Distributed Power Systems

• General Purpose POL DC‐DC Converters

• Game Consoles and Graphics Cards