IR3899
IR3899 is Synchronous Buck Regulator manufactured by International Rectifier.
9A Highly Integrated SupIRBuckTM Single‐Input Vo- l1ta-ge, Synchronous Buck Regulator
PD‐97661
IR3899
Features
- Single 5V to 21V application
- Wide Input Voltage Range from 1.0V to 21V with external Vcc
- Output Voltage Range: 0.5V to 0.86× Vin
- Enhanced Line/Load Regulation with Feed‐Forward
- Programmable Switching Frequency up to 1.5MHz
- Internal Digital Soft‐Start/Soft‐Stop
- Enable input with Voltage Monitoring Capability
- Thermally pensated Current Limit with robust hiccup mode over current protection
- Smart internal LDO to improve light load and full load efficiency
- External Synchronization with Smooth Clocking
- Enhanced Pre‐Bias Start‐Up
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