PD-60331 IR3821MPbF TM SupIRBuck HIGHLY INTEGRATED 7A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR Features Description Wide Input Voltage Range 2.5V to 21V TM The IR3821 SupIRBuck is an easy-to-use, fully Wide Output Voltage Range 0.6V to 12V integrated and highly efficient DC/DC regulator. Continuous 7A Load Capability The onboard switching controller and MOSFETs 600kHz High Frequency Operation make the IR3821 a space-efficient solution, Programmable Over-Current Protection providing accurate power delivery for low output Programmable PGood Output voltage applications. Hiccup Current Limit Precision Reference Voltage (0.6V) The IR3821 operates from a single 4.5V to 14V Programmable Soft-Start input supply and generates an output voltage Pre-Bias Start-up adjustable from 0.6V to 0.75*Vin at loads up to 7A. Thermal Protection A versatile regulator offering programmability of Thermally Enhanced Package startup time, power good threshold and current Small Size 5mmx6mm QFN limit, the IR3821s fixed 600kHz switching Pb-Free (RoHS Compliant) frequency allows the use of small external Applications components. Distributed Point-of-Loads The IR3821 also features important protection Server and Workstations functions, such as Pre-Bias startup, hiccup Embedded Systems current limit and thermal shutdown to provide the Storage Systems required system level security in the event of fault DDR Applications conditions. Graphics Cards Game Consoles Computing Peripheral Voltage Regulators Fig. 1. Typical application diagram 11/04/08 1 PD-60331 IR3821MPbF ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) V Supply Voltage -0.3V to 24V IN Vcc Supply Voltage -0.3V to 16V Vc Supply Voltage -0.3V to 30V SW -0.3V to 30V PGood -0.3V to 16V Fb,COMP,SS,Vsns -0.3V to 3.5V OCSet 10mA AGnd to PGnd -0.3V to +0.3V Storage Temperature Range -65C To 150C Operating Junction Temperature Range -40 C To 150C ESD Classification JEDEC, JESD22-A114 o Moisture Sensitivity Level JEDEC Level 3 260 C Caution: Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. PACKAGE INFORMATION 5mm x 6mm POWER QFN 10 11 12 V SW IN PGnd o = 35 C / W JA o = 2 C / W J-PCB 15 HG 9 PGood 13 AGnd V V 14 8 C CC 1 23 4 5 6 7 Vsns FB COMP AGnd AGnd SS OCSet Fig. 2: Package outline (Top view) ORDERING INFORMATION PACKAGE PACKAGE PIN PARTS PER DESIGNATOR COUNT REEL DESCRIPTION M IR3821MTRPbF 15 4000 M IR3821MTR1PbF 15 750 11/04/08 2