PD60366 IR3842MPbF TM HIGHLY EFFICIENT SupIRBuck INTEGRATED 4A SYNCHRONOUS BUCK REGULATOR Features Description Greater than 95% Maximum Efficiency TM The IR3842 SupIRBuck is an easy-to-use, fully Wide Input Voltage Range 1.5V to 16V integrated and highly efficient DC/DC Wide Output Voltage Range 0.7V to 0.9*Vin synchronous Buck regulator. The MOSFETs co- Continuous 4A Load Capability packaged with the on-chip PWM controller make Integrated Bootstrap-diode IR3842 a space-efficient solution, providing High Bandwidth E/A for excellent transient accurate power delivery for low output voltage performance applications. Programmable Switching Frequency up to 1.5MHz Programmable Over Current Protection (Hiccup) IR3842 is a versatile regulator which offers PGood output programmability of start up time, switching Precision Reference Voltage (0.7V, +/-1%) frequency and current limit while operating in Programmable Soft-Start wide input and output voltage range. Enable Input with Voltage Monitoring Capability The switching frequency is programmable from Enhanced Pre-Bias Start-up 250kHz to 1.5MHz for an optimum solution. Seq input for Tracking applications o o -40 C to 125 C operating junction temperature It also features important protection functions, Thermal Protection such as Pre-Bias startup, hiccup current limit and Pin compatible option for 8A and 12A devices thermal shutdown to give required system level 5mm x 6mm Power QFN Package, 0.9 mm height security in the event of fault conditions. Lead-free, halogen-free and RoHS compliant Applications Netcom Applications Server Applications Computing Peripheral Voltage Regulators Storage Applications General DC-DC Converters Embedded Telecom Systems Distributed Point of Load Power Architectures 1.5V <Vin<16V 4.5V <Vcc<5.5V Enable Vin Seq Boot Vo Vcc SW PGood PGood OCSet Fb Rt Comp SS/ SD Gnd PGnd Fig. 1. Typical application diagram 1 06/18/09 IR3842MPbF 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 3 260 C 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 PGnd 12 10 o = 35 C / W JA o = 2 C / W J-PCB 15 13 V Boot 9 CC Gnd PGood Enable 14 8 1 4 7 23 5 6 Seq FB COMP Gnd Rt SS OCSet ORDERING INFORMATION PACKAGE PACKAGE PIN COUNT PARTS PER DESIGNATOR REEL DESCRIPTION M IR3842MTRPbF 15 4000 M IR3842MTR1PbF 15 750 2 06/18/09