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IR3840MTRPBF Datasheet(PDF) 1 Page - International Rectifier |
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IR3840MTRPBF Datasheet(HTML) 1 Page - International Rectifier |
1 / 32 page 06/18/09 IR3840MPbF 1 Features • Greater than 96% Maximum Efficiency • Wide Input Voltage Range 1.5V to 16V • Wide Output Voltage Range 0.7V to 0.9*Vin • Continuous 12A 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 • -40oC to 125oC operating junction temperature • Thermal Protection • Pin compatible option for 4A and 8A devices • 5mm x 6mm Power QFN package, 0.9 mm height • Lead-free, halogen-free and RoHS compliant Applications • Server Applications • Storage Applications • Embedded Telecom Systems • Distributed Point of Load Power Architectures Fig. 1. Typical application diagram Description The IR3840 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC synchronous Buck regulator. The MOSFETs co- packaged with the on-chip PWM controller make IR3840 a space-efficient solution, providing accurate power delivery for low output voltage applications. IR3840 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 250kHz 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. HIGHLY EFFICIENT INTEGRATED 12A SYNCHRONOUS BUCK REGULATOR SupIRBuckTM Boot Vcc Fb Comp Gnd PGnd SW OCSet SS/ SD 4.5V <Vcc<5.5V Vo PGood PGood Enable Rt 1.5V <Vin<16V Vin Seq • Netcom Applications • Computing Peripheral Voltage Regulators • General DC-DC Converters PD60364 |
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