IR3842MPBF Datasheet | International Rectifier

Features - - - - - - - - - - - - - - - - - - - HIGHLY EFFICIENT Description The IR3842 Sup IRBuck TM is an easy-to-use, fully integrated and highly efficient DC/DC synchronous Buck regulator. The MOSFETs copackaged with the on-chip PWM controller make IR3842 a space-efficient solution, providing accurate power delivery for low output voltage applications. IR3842 is a versatile regulator which offers programmability of start up time, switching frequency and current limit while operating in wide input and output voltage range. The switching frequency is programmable from 250k Hz to 1.5MHz for an optimum solution. It also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of fault conditions. INTEGRATED 4A SYNCHRONOUS BUCK REGULATOR Greater than 95% Maximum Efficiency Wide Input Voltage Range 1.5V to 16V Wide Output Voltage Range 0.7V to 0.9- Vin Continuous 4A Load Capability Integrated Bootstrap-diode High Bandwidth E/A for excellent transient performance Programmable Switching Frequency up to 1.5MHz Programmable Over Current Protection (Hiccup) PGood output Precision Reference Voltage (0.7V, +/-1%) Programmable Soft-Start Enable Input with Voltage Monitoring Capability Enhanced Pre-Bias Start-up Seq input for Tracking applications -40o C to 125o C operating junction temperature Thermal Protection Pin patible option for 8A and 12A devices 5mm x 6mm Power QFN Package, 0.9 mm height Lead-free, halogen-free and Ro HS pliant Applications - - - - Server Applications Storage Applications Embedded Tele Systems Distributed Point of Load Power Architectures 1.5V <Vin<16V - - - Net Applications puting Peripheral Voltage Regulators General DC-DC Converters 4.5V <Vcc<5.5V Seq Vcc PGood PGood Enable Vin Boot Vo SW OCSet Fb Rt p SS/ SD Gnd PGnd Fig. 1. Typical application diagram 06/18/09 1 .. IR3842MPb F ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND...