onsemi

MC33166TG

MC33166TG Description

The MC33166TG from onsemi is a versatile adjustable switching voltage regulator designed for high-efficiency DC-DC conversion. This obsolete but robust IC supports buck and boost topologies, making it suitable for a wide input voltage range of 7.5V to 40V and delivering an adjustable output voltage up to 40V (switch) with a 3.3A (switch) output current. Operating at a 72kHz switching frequency, it balances performance and efficiency while minimizing external component count. The device is housed in a TO-220-5 through-hole package, ensuring ease of integration in industrial and automotive systems.

MC33166TG Features

• Wide Input Range (7.5V–40V): Supports diverse power sources, including automotive and industrial supplies.
• Adjustable Output (5.05V–40V): Flexible for both step-down (buck) and step-up (boost) configurations.
• High Current Capability (3.3A Switch): Ideal for medium-power applications.
• Non-Synchronous Rectification: Simplifies design while maintaining efficiency.
• 72kHz Fixed Frequency: Reduces noise and simplifies filtering.
• Robust Packaging (TO-220-5): Suitable for high-reliability environments.
• ROHS3 Compliant & REACH Unaffected: Meets environmental and regulatory standards.

MC33166TG Applications

The MC33166TG excels in systems requiring stable, adjustable power conversion, such as:

• Automotive Electronics: Power management for infotainment, sensors, and lighting.
• Industrial Controls: Motor drives, PLCs, and instrumentation.
• Telecom & Networking: Intermediate bus converters and PoE modules.
• Renewable Energy Systems: Solar charge controllers and battery management.
  Its buck/boost versatility makes it superior to fixed-topology regulators, while its wide voltage range outperforms lower-input alternatives.

Conclusion of MC33166TG

Though obsolete, the MC33166TG remains a reliable choice for engineers needing flexible, high-current DC-DC conversion in harsh environments. Its wide input range, adjustable output, and robust design make it ideal for legacy systems or applications where newer alternatives are unavailable. For projects demanding efficiency and adaptability, this regulator delivers proven performance.