PD-xxxxx IR3820AMPbF SupIRBuck TM HIGHLY INTEGRATED 14A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR Features • • • • • • • • • • • • • • Wide Input Voltage Range 2.5V to 21V Wide Output Voltage Range 0.6V to 12V Continuous 14A Load Capability 300kHz High Frequency Operation Programmable Over-Current Protection Programmable PGood Output 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) Applications • • • • • • • • Distributed Point-of-Loads Server and Workstations Embedded Systems Storage Systems DDR Applications Graphics Cards Game Consoles Computing Peripheral Voltage Regulators Description The IR3820A SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3820A a space-efficient solution, providing accurate power delivery for low output voltage applications. The IR3820A operates from a 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.75*Vin at loads up to 14A. A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3820A’s fixed 300kHz switching frequency allows the use of small external components. The IR3820A 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. Fig. 1. Typical application diagram 11/28/07 1