DESCRIPTION

The IR3899 SupIRBuckTM is an easy‐to‐use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make IR3899 a space‐efficient solution, providing accurate power delivery.

IR3899 is a versatile regulator which offers programmable switching frequency and the fixed internal current limit while operates in wide input and output voltage range.

FEATURES

• Single 5V to 21V application

• Wide Input Voltage Range from 1.0V to 21V with external Vcc

• Output Voltage Range: 0.5V to 0.86× Vin

• Enhanced Line/Load Regulation with Feed‐Forward

• Programmable Switching Frequency up to 1.5MHz

• Internal Digital Soft‐Start/Soft‐Stop

• Enable input with Voltage Monitoring Capability

• Thermally Compensated Current Limit with robust hiccup mode over current protection

• Smart internal LDO to improve light load and full load efficiency

• External Synchronization with Smooth Clocking

• Enhanced Pre‐Bias Start‐Up

• Precision Reference Voltage (0.5V+/‐0.5) with margining capability

• Vp for Tracking Applications (Source/Sink Capability +/‐9A)

• Integrated MOSFET drivers and Bootstrap Diode

• Thermal Shut Down

• Programmable Power Good Output with tracking capability

• Monotonic Start‐Up

• Operating temp: ‐40oC < Tj < 125oC

• Small Size: 4mm x 5mm PQFN

• Lead‐free, Halogen‐free and RoHS Compliant

APPLICATIONS

• Netcom Applications

• Embedded Telecom Systems

• Server Applications

• Storage Applications

• Distributed Point of Load Power Architectures