IR3889 Overview
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.
IR3889 Key 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
- 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 pensated 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
IR3889 Applications
- dc Buck regulator. The onboard PWM controller and OptiMOS™ FETs with integrated bootstrap diode make IR3889 a small footprint solution, providing high-efficient