IR3899AMTRPBF

The IR3899A is an easy-to-use, fully integrated dc - dc Buck regulator. The onboard PWM controller and MOSFETs with integrated bootstrap diode make IR3899A a small footprint solution, providing high-efficiency power delivery. Furthermore, it uses a fast Constant On-Time (COT) control scheme, which simplifies design efforts and provides fast control response. The IR3899A has an internal low dropout voltage regulator, allowing operation with a single supply. The IR3899A is a versatile regulator, offering programmable switching frequency from 600 kHz to 2 MHz, two selectable current limits, 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 limits, over voltage and under voltage protection, and thermal shutdown to give required system level security in the event of fault conditions.

Applications

• Server Applications
• Storage Applications
• Telecom & Datacom Applications Distributed Point of Load Power Architectures

Key features

• Single 4.3 V to 17 V application
• Precision Reference Voltage (0.6 V +/ -0.5%)
• Enhanced Fast COT engine stable with Ceramic Output Capacitors and No External Compensation
• Optional Forced Continuous Conduction Mode or Diode Emulation for Enhanced Light Load Efficiency
• Programmable Switching Frequency from 600 kHz to 2 MHz
• Enable input with Voltage Monitoring Capability & Power Good Output
• Monotonic Start-Up with 2 ms soft start time & Enhanced Pre-Bias Start up
• Thermally compensated Internal Over Current Protection with Two Selectable Settings
• Thermal Shut Down
• Operating Junction Temp: -40 °C < Tj < 125 °C
• Small Size: 4 mm x 5 mm PQFN
• Halogen-free and RoHS Compliant