PD-60335 IR3812MPbF TM SupIRBuck HIGHLY INTEGRATED 4A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR Features Description Wide Input Voltage Range 2.5V to 21V TM The IR3812 SupIRBuck is an easy-to-use, fully Wide Output Voltage Range 0.6V to 12V integrated and highly efficient DC/DC regulator. Continuous 4A Load Capability The onboard switching controller and MOSFETs 600kHz High Frequency Operation make the IR3812 a space-efficient solution, Programmable Over-Current-Protection providing accurate power delivery for low output Hiccup Current Limit voltage applications. Tracking capability for Memory Application Precision Reference Voltage (0.6V) The IR3812 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 4A. Thermal Protection IR3812 can be configured for tracking Thermally Enhanced Package applications to generate termination voltage (VTT) Small Size 5mmx6mm QFN for memory applications. Pb-Free (RoHS Compliant) A versatile regulator offering programmability of Applications start up time and current limit, the IR3812s fixed Distributed Point-of-Loads 600kHz switching frequency allows the use of Server and Workstations small external components. Embedded Systems IR3812 also features important protection Storage Systems functions, such as Pre-Bias startup, hiccup DDR Applications current limit and thermal shutdown to provide the Graphics Cards required system level security in the event of fault Game Consoles conditions. Computing Peripheral Voltage Regulators Fig. 1. Typical application diagram 11/04/08 1 PD-60335 IR3812MPbF 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 SW V IN PGnd o = 35 C / W JA o = 2 C / W J-PCB 15 Vref 13 9 HG AGnd Vc 14 V 8 CC 1 4 7 23 5 6 Vp FB COMP AGnd AGnd SS OCSet Fig. 2: Package outline (Top view) ORDERING INFORMATION PACKAGE PACKAGE PIN PARTS PER DESIGNATOR COUNT REEL DESCRIPTION M IR3812MTRPbF 15 4000 M IR3812MTR1PbF 15 750 11/04/08 2