IR3853MTRPBF Switching Voltage Regulators 4A SupIRBuck Reg 250-1500kHz 1.5-21V

Description

The IR3853 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 IR3853 a space-efficient

solution, providing accurate power delivery for low output voltage applications. IR3853 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, over-voltage, and thermal shutdown to give required system level security in the event of

fault conditions.

Features

• Greater than 95% Maximum Efficiency

• Wide Input Voltage Range 1.5V to 21V

• 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

• Over Voltage Protection

• Dedicated input for output voltage monitoring

• Programmable 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

• External Synchronization

• -40oC to 125oC operating junction temperature

• Thermal Protection

• 4mm x 5mm Power QFN Package

• Halogen Free, Lead Free and RoHS compliant

Applications

• Server Applications

• Storage Applications

• Embedded Telecom Systems

•Distributed Point of Load Power Architectures

• Netcom Applications

• Computing Peripheral Voltage Regulators

• General DC-DC Converters