Texas Instruments

LM5000SD-3  

DC Switching Voltage Regulators

LM5000SD-3 Description

The LM5000SD-3 from Texas Instruments is a high-performance, adjustable-output DC switching voltage regulator designed for demanding power management applications. This obsolete but robust IC supports a wide input voltage range of 3.1V to 40V, making it suitable for systems requiring flexible power conversion. With an output voltage range of 3.1V to 80V (Switch) and a switching current capability of 1.35A, it excels in boost, flyback, and forward converter topologies. Packaged in a 16WSON surface-mount format with Tape & Reel (TR) delivery, it is optimized for automated assembly.

LM5000SD-3 Features

• Adjustable Output: Enables precise voltage regulation for diverse applications.
• Wide Input Range (3.1V–40V): Supports operation from low-voltage batteries to industrial power rails.
• High Switching Frequency (300kHz/700kHz): Balances efficiency and component size for compact designs.
• Single Positive Output (1.35A Switch): Ideal for moderate-power loads with minimal external components.
• Non-Synchronous Rectification: Simplifies design while maintaining reliability.
• REACH Unaffected & MSL1: Compliant with environmental standards and suitable for long-term storage.
• Versatile Topologies: Supports boost, flyback, and forward converter configurations.

LM5000SD-3 Applications

The LM5000SD-3 is particularly suited for:

• Industrial Power Systems: Voltage step-up/step-down in PLCs, motor drives, and sensors.
• Automotive Electronics: Power conditioning for infotainment, lighting, and telematics.
• Telecom/Networking Equipment: Isolated power supplies and PoE (Power over Ethernet) applications.
• Renewable Energy Systems: DC-DC conversion in solar microinverters and battery management.
• LED Drivers: Constant-voltage/current regulation for high-brightness lighting.

Conclusion of LM5000SD-3

Though marked obsolete, the LM5000SD-3 remains a reliable choice for engineers needing a flexible, high-voltage switching regulator. Its wide input range, adjustable output, and multi-topology support make it adaptable to diverse power challenges. While newer alternatives exist, its proven performance in industrial, automotive, and telecom applications ensures continued relevance in legacy designs or specific high-voltage scenarios. For projects requiring efficiency, compactness, and versatility, the LM5000SD-3 delivers a compelling balance of features.

LM5000SD-3 Documents

Download datasheets and manufacturer documentation for LM5000SD-3

Datasheets :

LM5000      

Design Resources :

LM5000-3 Design with WEBENCH® Power Designer      

HTML Datasheet :

LM5000