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IR3843WMPBF

Part Number	IR3843WMPBF
Manufacturer	International Rectifier
Description	HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR
Published	Jul 21, 2010
Detailed Description	PD-97507 IR3843WMPbF www.DataSheet4U.com SupIRBuck Features • • • • • • • • • • • • • • • • • • • TM HIGHLY EFFICIE...
Datasheet	IR3843WMPBF PDF File

Overview

PD-97507 IR3843WMPbF www.
DataSheet4U.
com SupIRBuck Features • • • • • • • • • • • • • • • • • • • TM HIGHLY EFFICIENT Description The IR3843W SupIRBuckTM 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 IR3843W a space-efficient solution, providing accurate power delivery for low output voltage applications.
IR3843W 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.
INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR Wide Input Voltage Range 1.
5V to 16V Wide Output Voltage Range 0.
7V to 0.
9*Vin Continuous 2A Load Capability Integrated Bootstrap-diode High Bandwidth E/A for excellent transient performance Programmable Switching Frequency up to 1.
5MHz Programmable Over Current Protection PGood output Hiccup Current Limit 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 Multiple current ratings in pin compatible footprint 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 1.
5V Regulators General DC-DC Converters 4.
5V 5V Seq Vcc PGood PGood Enable Vin Boot Vo SW OCSet Fb Rt Comp SS/ SD Gnd PGnd Fig.
1.
Typical application diagram Rev 10.
0 1 PD-97507 I...

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IR3843WMPBF HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR - International Rectifier

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