PD-97660 IR3831WMPbF TM SupIRBuck HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS Features Description Wide Input Voltage Range 1.0V to 16V TM The IR3831W SupIRBuck is an easy-to-use, Wide Output Voltage Range 0.6V to 0.9*Vin fully integrated and highly efficient DC/DC Continuous 8A Load Capability regulator. The MOSFETS co-packaged with the Integrated Bootstrap-diode on-chip PWM controller make IR3831W a space- High Bandwidth E/A for excellent transient efficient solution, providing accurate power performance delivery for DDR memory applications. Programmable Switching Frequency up to 1.5 MHz IR3831W is configured to generate termination Programmable Over Current Protection voltage (VTT) for DDR memory applications. PGood output Hiccup Current Limit IR3831W offers programmability of start up time, Programmable Soft-Start switching frequency and current limit while Enable Input with Voltage Monitoring Capability operating in wide input and output voltage range. Enhanced Pre-Bias Start-up The switching frequency is programmable from Vp input for DDR Tracking applications 250kHz to 1.5MHz for an optimum solution. o o -40 C to 125 C operating junction temperature Thermal Protection It also features important protection functions, 5mm x 6mm Power QFN Package, 0.9 mm height such as Pre-Bias startup, hiccup current limit and Lead-free, halogen-free and RoHS compliant thermal shutdown to give required system level security in the event of fault conditions. Applications Server Applications Distributed Point of Load Power Architectures Storage Applications Netcom Applications Embedded Telecom Systems 1.0V <Vin<16V 4.5V <Vcc<5.5V Enable Vin Boot Vo Vcc VDDQ SW PGood PGood OCSet Vp Fb Rt Comp PGnd SS/ SD Gnd Fig. 1. Typical application diagram 1 Rev 16.0 PD-97660 IR3831WMPbF ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND unless otherwise specified) Vin . -0.3V to 25V Vcc ...... -0.3V to 8V (Note2) Boot .... -0.3V to 33V SW .. -0.3V to 25V(DC), -4V to 25V(AC, 100ns) Boot to SW ....... -0.3V to Vcc+0.3V (Note1) OCSet .. -0.3V to 30V, 30mA Input / output Pins ... -0.3V to Vcc+0.3V (Note1) PGND to GND ..... -0.3V to +0.3V Storage Temperature Range ................................... -55C To 150C Junction Temperature Range ................................... -40C To 150C (Note2) ESD Classification JEDEC Class 1C Moisture sensitivity level...JEDEC Level 2 260 C (Note5) Note1: Must not exceed 8V o o Note2: Vcc must not exceed 7.5V for Junction Temperature between -10 C and -40 C Stresses beyond those listed under Absolute Maximum Ratings 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 are not implied. PACKAGE INFORMATION SW 5mm x 6mm POWER QFN V IN 11 12 PGnd 10 o = 35 C / W JA o = 2 C / W J-PCB 15 V Boot 9 13 CC Gnd Enable PGood 14 8 1 4 7 23 5 6 Vp FB COMP Gnd Rt SS OCSet ORDERING INFORMATION PACKAGE PACKAGE PIN COUNT PARTS PER DESIGNATOR REEL DESCRIPTION M IR3831WMTRPbF 15 4000 M IR3831WMTR1PbF 15 750 2 Rev 16.0