IR3889 IR OptiMOS™ IPOL 30 A single-voltage synchronous Buck regulator
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%) Enhenced Fast COT Engine Stable with Ceramic Output Capacitors 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 Temp: -40 °C < Tj < 125 °C Small Size: 5 mm x 6 mm PQFN Lead-free, Halogen-free and RoHS2 Compliant with Exemption 7a Potential applications Server Applications Storage Applications Telecom & Datacom Applications Distributed Point of Load Power Architectures Product validation
Qualified for industrial applications according to the relevant tests of JEDEC47/20/22 Description
The IR3889 is an easy-to-use, fully integrated dc -dc Buck regulator. The onboard PWM controller and OptiMOS™
FETs with integrated bootstrap diode make 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.
The IR3889 has an internal low dropout voltage regulator, allowing operations with a single supply. It can also
operate with an external bias supply, with an extended operating input voltage (PVin) range from 2.0 V to 17 V.
The IR3889 is a versatile regulator, offering programmable switching frequency from 600 kHz to 2 MHz, four
selectable current limits, four selectable soft-start time, Forced Continuous Conduction Mode (FCCM) and Diode
Emulation Mode (DEM) operation.
It also features important protection functions, such as pre-bias start-up, thermally compensated current limit,
over voltage and under voltage protection, and thermal shutdown to give required system level security in the
event of fault conditions. Final Datasheet
www.infineon.com Please read the Important Notice and Warnings at the end of this document
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2020-1-16 IR OptiMOS™ IPOL 30 A single-voltage synchronous Buck regulator
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Product validation . 1
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