Manufacturer: Texas Instruments
Key Specifications
- Package: SOIC-8
- Topology: Buck (Step-Down)
- Output Current: 3A
- Input Voltage Range: 3.5V to 28V
- Output Voltage: Adjustable (0.8V to VIN)
- Switching Frequency: 570 kHz (typical)
- Operating Temperature: -40°C to 125°C (junction)
- Synchronous Rectification: No (external Schottky diode required)
The TPS54331DR from Texas Instruments is a versatile, 3A step-down (buck) converter designed for a wide range of power supply applications. It operates from an input voltage range of 3.5V to 28V, making it suitable for systems powered by 5V, 12V, or 24V rails. The output voltage is adjustable down to 0.8V, allowing flexibility for various load requirements.
Key Features
- 3A continuous output current capability
- Wide input voltage range: 3.5V to 28V
- Adjustable output voltage from 0.8V to VIN
- 570 kHz fixed switching frequency for compact design
- Low quiescent current (typically 100 µA) for improved light-load efficiency
- Integrated high-side MOSFET with external Schottky diode for low-side
- Built-in overcurrent, overvoltage, and thermal shutdown protections
- Available in industry-standard SOIC-8 package
Applications
- Industrial and consumer power supplies
- Distributed power systems
- Point-of-load (POL) converters
- Battery-powered equipment
- Networking and telecom equipment
Selection Guidance
When designing with the TPS54331DR, ensure that the input voltage and output current are within the specified limits. The external Schottky diode must be selected to handle the peak current and reverse voltage. For detailed design calculations, refer to the datasheet and application notes. The device is suitable for applications requiring a simple, cost-effective buck solution without synchronous rectification.
