PD-97659 IR3842WMPbF TM HIGHLY EFFICIENT SupIRBuck INTEGRATED 4A SYNCHRONOUS BUCK REGULATOR Features Description Greater than 95% Maximum Efficiency TM The IR3842W SupIRBuck is an easy-to-use, Wide Input Voltage Range 1.5V to 16V fully 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 IR3842W 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 IR3842W is a versatile regulator which offers PGood output programmability of start up time, switching Hiccup Current Limit frequency and current limit while operating in Precision Reference Voltage (0.7V, +/-1%) wide input and output voltage range. Programmable Soft-Start The switching frequency is programmable from Enable Input with Voltage Monitoring Capability 250kHz to 1.5MHz for an optimum solution. Enhanced Pre-Bias Start-up Seq input for Tracking applications It also features important protection functions, o o C to 125 C operating junction temperature -40 such as Pre-Bias startup, hiccup current limit and Thermal Protection thermal shutdown to give required system level Pin compatible option for 8A and 12A devices security in the event of fault conditions. 5mm x 6mm Power QFN Package, 0.9 mm height Lead-free, halogen-free and RoHS compliant Applications Distributed Point of Load Power Architectures Server Applications Netcom Applications Storage Applications Computing Peripheral Voltage Regulators Embedded Telecom Systems General DC-DC Converters 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 Rev 13.0 PD-97659 IR3842WMPbF 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 12 11 PGnd 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 PARTS PER DESIGNATOR COUNT REEL DESCRIPTION M IR3842WMTRPbF 15 4000 M IR3842WMTR1PbF 15 750 2 Rev 13.0