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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