onsemi NCP3133A 3A Integrated Synchronous Buck Converter
onsemi NCP3133A 3A integrated synchronous buck converter is designed as a fully integrated synchronous buck converter for 3.3V and 5V step-down applications. NCP3133A can offer up to 3A load current. The device supports high efficiency, fast transient response, and provides a Power Good indicator. The control scheme includes two operation modes: FCCM and automatic CCM/DCM. In automatic CCM/DCM mode, NCP3133A can smoothly switch between CCM and DCM, where the converter runs at reduced switching frequency with much higher efficiency. This design makes the onsemi NCP3133A 3A Integrated Synchronous Buck Converter ideal for servers, desktop and notebook computers, and networking systems.
Features
- High efficiency in both CCM and DCM
- Support MLCC output capacitor
- High operation frequency at 1.1MHz
- Small footprint, 3mm x 3mm, 16-pin QFN package
- Up to 3A continuous output current
- 2.9V to 5.5V wide conversion voltage range
- Output voltage range from 0.6V to 0.84 X VIN
- Internal 400µs soft start
- Automatic power-saving mode
- Voltage mode control
- Support pre-bias startup functionality
- Output discharge operation
- Overtemperature protection
- Built-in overvoltage, undervoltage and overcurrent protection
- Power Good indicator
Applications
- 5V step-down rail
- 3.3V step-down rail
- Servers
- Desktop computers
- Notebooks
- Networking systems
Block Diagram
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