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IR3801AMPBF Datasheet(PDF) 1 Page - International Rectifier |
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IR3801AMPBF Datasheet(HTML) 1 Page - International Rectifier |
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1 / 21 page  11/04/08 1 PD-60355 IR3801AMPbF HIGHLY INTEGRATED 9A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR Features • Wide Input Voltage Range 2.5V to 21V • Wide Output Voltage Range 0.6V to 12V • Continuous 9A Load Capability • 300kHz High Frequency Operation • Programmable Over-Current Protection • Hiccup Current Limit • Precision Reference Voltage (0.6V) • Programmable Soft-Start • Pre-Bias Start-up • Thermal Protection • Thermally Enhanced Package • Small Size 5mmx6mm QFN • Pb-Free (RoHS Compliant) Fig. 1. Typical application diagram Description The IR3801A SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3801A a space-efficient solution, providing accurate power delivery for low output voltage applications. The IR3801A operates from a single 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.8*Vin at loads up to 9A. A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3801A’s fixed 300kHz switching frequency allows the use of small external components. The IR3801A also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to provide the required system level security in the event of fault conditions. SupIRBuckTM Applications • Game Consoles • Set-top Boxes • Graphics Cards • LCD TVs • Desktop PCs • Distributed Point-of-Loads • Embedded Systems • Computing Peripheral Voltage Regulators |
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