PD-97509 IR3843AMPbF TM HIGHLY EFFICIENT SupIRBuck INTEGRATED 3A SYNCHRONOUS BUCK REGULATOR Features Description Wide Input Voltage Range 1.5V to 21V TM The IR3843A SupIRBuck is an easy-to-use, Wide Output Voltage Range 0.7V to 0.9*Vin fully integrated and highly efficient DC/DC Continuous 3A Load Capability synchronous Buck regulator. The MOSFETs co- Integrated Bootstrap-diode packaged with the on-chip PWM controller make High Bandwidth E/A for excellent transient IR3843A a space-efficient solution, providing performance accurate power delivery for low output voltage Programmable Switching Frequency up to 1.2MHz applications. Programmable Over Current Protection PGood output IR3843A is a versatile regulator which offers Hiccup Current Limit 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 1.2MHz 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 Multiple current ratings in pin compatible footprint 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 Rev 16.0 PD-97509 IR3843AMPbF 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 IR3843AMTRPbF 15 4000 M IR3843AMTR1PbF 15 750 2 Rev 16.0