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