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RK73H1J1002F Datasheet(PDF) 1 Page - International Rectifier |
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RK73H1J1002F Datasheet(HTML) 1 Page - International Rectifier |
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1 / 21 page  March 27, 2013 | V2.2 | PD97603 1 IR3476 12A Highly Integrated SupIRBuck TM FEATURES • Input Voltage Range: 3V to 27V • Output Voltage Range: 0.5V to 12V • Continuous 12A 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 • Small, Low Profile 5mm x 6mm QFN Package BASIC APPLICATION Figure 1: IR3476 Basic Application Circuit DESCRIPTION The IR3476 SupIRBuck TM is an easy‐to‐use, fully integrated and highly efficient DC/DC voltage regulator. The onboard constant on time hysteretic controller and MOSFETs make IR3476 a space‐efficient solution that delivers up to 12A of precisely controlled output voltage. Programmable switching frequency, soft start, and thermally compensated over current protection allows for a very flexible solution suitable for many different applications and an ideal choice for battery powered applications. Additional features include pre‐bias startup, very precise 0.5V reference, under/over voltage shutdown, thermal protection, power good output, and enable input with voltage monitoring capability. 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 EFFICIENCY Figure 2: IR3476 Efficiency 45% 55% 65% 75% 85% 95% 0.01 0.1 1 10 100 Load Current (A) 12VIN 8VIN 19VIN |
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