IR3891 Overview
Description
The IR3891 SupIRBuck® is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make IR3891 a space-efficient solution, providing accurate power delivery for low output voltage.
Key Features
- Single 5V to 21V application
- Wide Input Voltage Range from 1V to 21V with external Vcc
- Output Voltage Range: 0.5V to 0.86*PVin
- Dual output, 4A/Phase
- Enhanced Line/Load Regulation with Feed- Forward
- Programmable Switching Frequency up to 1.5MHz
- Internal Digital Soft-Start
- Enable input with Voltage Monitoring Capability
- Thermally compensated current limit and Hiccup Mode Over Current Protection
- External synchronization with Smooth Clocking
