Overview
The TPS5450DDAR is a non-synchronous step-down (buck) DC/DC converter designed for efficient power regulation in distributed power systems.
It is widely used in industrial control boards, networking equipment, and embedded systems, where high efficiency, wide input voltage range, and reliable current capability are required.
This device integrates a high-side MOSFET and advanced control features, reducing external component count and simplifying power supply design.
Core Parameters
| Parameter | Specification |
|---|---|
| Device Type | Step-Down (Buck) DC/DC Converter |
| Input Voltage Range | 5.5 V to 36 V |
| Output Current | Up to 5 A |
| Switching Frequency | 500 kHz |
| Control Method | Voltage mode |
| Integrated Switch | Yes |
| Efficiency | High efficiency operation |
| Protection Features | Overcurrent, thermal shutdown |
| Operating Temperature | -40°C to +125°C |
| Package | SO PowerPAD (DDAR) |
These parameters make the device suitable for high-current power regulation, especially where wide input voltage tolerance and thermal reliability are critical.
Features
- Integrated high-side MOSFET simplifies design
- Wide input voltage range supports industrial rails
- Fixed 500 kHz switching frequency reduces EMI filtering size
- Adjustable output voltage for flexible system design
- Built-in protection enhances system reliability
- PowerPAD package improves thermal performance
Typical Application Scenarios
- Industrial power supplies
- Embedded control systems
- Network switches and routers
- Point-of-load regulation
- Distributed power architectures
In synchronous buck power stages using the TPS5450DDAR, designers often select the CSD87350Q5D dual NexFET™ MOSFET to improve conduction efficiency and reduce switching losses. The low R<sub>DS(on)</sub> and high current capability of the CSD87350Q5D help optimize overall DC-DC converter performance.
Performance Comparison
| Feature | TPS5450DDAR | Linear Regulator | Low-Power Buck Converter |
|---|---|---|---|
| Output Current | High (5 A) | Low | Medium |
| Efficiency | High | Low | High |
| Input Voltage Range | Wide | Limited | Narrower |
| Thermal Performance | Excellent | Poor | Good |
| System Complexity | Medium | Very Low | Low |
Compared with linear regulators, the TPS5450DDAR provides significantly higher efficiency and lower heat dissipation, while offering higher current capability than many low-power buck converters.
Conclusion
The TPS5450DDAR is a robust and efficient power management solution for high-current step-down applications. Its wide input range, integrated switching MOSFET, and comprehensive protection features make it an excellent choice for industrial, networking, and embedded power designs.
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Manufacturer Profile
Texas Instruments (TI) is a global leader in analog and embedded semiconductor technologies. TI’s power management solutions are widely used across industrial, automotive, and communications markets, offering long-term availability and proven reliability.
FAQ
Q1: What is the maximum output current of TPS5450DDAR?
It supports up to 5 A output current with proper thermal design.
Q2: Does TPS5450DDAR require an external MOSFET?
No. The high-side MOSFET is fully integrated.
Q3: Is this device suitable for industrial voltage rails?
Yes. Its wide input voltage range up to 36 V makes it ideal for industrial systems.
Q4: How can the quality of the TPS5450DDAR be verified?
7SEtronic has a complete standardized quality inspection SOP, including label verification, visual inspection, and X-RAY analysis, to ensure authenticity and performance.
For more information and to review our available inventory, please contact our team for detailed pricing, current stock levels, and any additional technical support you may need.
You can find more component guides and application notes in our Component Technical Guides section: