The IR3889 OptiMOSTM IPOL is an easy-to-use, fully integrated DC-DC buck regulator. The onboard PWM controller and OptiMOS™ MOSFETs with integrated bootstrap diode make the IR3889 a small footprint solution, providing high-efficient power delivery. Furthermore, it uses a fast Constant-On-Time (COT) control scheme, which simplifies the design efforts and achieves fast control response. Summary of Features

• Single 4.3 V to 17 V application or wide input voltage range from 2.0 V to 17 V with an external VCC Precision reference voltage (0.8 V +/- 0.5%) Enhanced fast COT engine stable with ceramic output capacitors and no external compensation Optional forced continuous conduction mode and diode emulation for enhanced light load efficiency Programmable switching frequency from 600 kHz to 2 MHz Monotonic start-up with four selectable soft-start time & enhanced pre-bias start-up Thermally compensated internal over-current protection with four selectable settings Enable input with voltage monitoring capability & power good output Thermal shut down Operating temperature: -40°C < Tj < 125°C Small size: 5 mm x 6 mm PQFN Lead-free, halogen-free and RoHS2 compliant with Exemption 7a

Target Applications

• Server applications Storage applications Telecom and Datacom applications Distributed Point-of-Load power architectures