Texas Instruments

LM2831XMF  

DC Switching Voltage Regulators

LM2831XMF Description

The LM2831XMF from Texas Instruments is a high-efficiency, 1.5A step-down (Buck) DC-DC switching regulator with an adjustable output voltage range of 0.6V to 4.5V. Designed for surface-mount applications, it operates over a 3V to 5.5V input range, making it suitable for low-voltage power systems. The device integrates a 1.6MHz fixed-frequency PWM controller, enabling compact designs with minimal external components. Despite its obsolete status, the LM2831XMF remains a reliable choice for space-constrained applications due to its SOT23-5 package and Tape & Reel (TR) packaging for automated assembly.

LM2831XMF Features

• Adjustable Output: Precision output voltage adjustment via external resistors.
• High Efficiency: Non-synchronous rectification topology with 1.5A continuous output current.
• Wide Input Range: Supports 3V to 5.5V, ideal for battery-powered and 3.3V/5V rail systems.
• Compact Design: 1.6MHz switching frequency reduces inductor size, saving PCB space.
• Robust Packaging: SOT23-5 package with MSL 1 (Unlimited) moisture sensitivity, ensuring easy handling.
• Low Dropout: Maintains regulation even at low input-output differentials.

LM2831XMF Applications

The LM2831XMF excels in portable electronics, point-of-load (POL) regulation, and battery-powered devices such as:

• Handheld Instruments: Efficient power management for sensors and microcontrollers.
• Consumer Electronics: Voltage regulation for USB-powered gadgets and low-power displays.
• Embedded Systems: Ideal for FPGA/ASIC auxiliary power due to its fast transient response.
• Industrial Controls: Reliable performance in 3.3V/5V distributed power architectures.

Conclusion of LM2831XMF

The LM2831XMF offers a balance of compact size, efficiency, and flexibility, making it a strong candidate for low-voltage, high-current applications. While marked obsolete, its wide input range, adjustable output, and high switching frequency ensure relevance in legacy and cost-sensitive designs. Engineers seeking a space-saving, high-performance buck regulator for portable or embedded systems may still find this IC a viable solution.

LM2831XMF Documents

Download datasheets and manufacturer documentation for LM2831XMF

Datasheets :

LM2831 Datasheet       LM2831 User Guide      

Design Resources :

LM2831X Design with WEBENCH® Power Designer      

HTML Datasheet :

LM2831 Datasheet       LM2831 User Guide