Texas Instruments

LM27313XMFX

LM27313XMFX Description

The LM27313XMFX from Texas Instruments is a high-efficiency, adjustable-output DC-DC boost switching regulator designed for compact, power-sensitive applications. Operating within an input voltage range of 2.7V to 14V, it delivers an output voltage adjustable from 5V up to 28V with a switching current capability of 800mA. The device features a fixed 1.6MHz switching frequency, enabling the use of small external components while minimizing output ripple. Packaged in a SOT23-5 surface-mount form factor, it is optimized for space-constrained designs. Although marked as obsolete, it remains a reliable choice for legacy systems requiring high-performance voltage regulation.

LM27313XMFX Features

• Wide Input Range: Supports 2.7V–14V, making it suitable for battery-powered and low-voltage applications.
• High Switching Frequency: 1.6MHz operation reduces inductor size and PCB footprint.
• Adjustable Output: Configurable from 5V to 28V for versatile design flexibility.
• Compact Design: SOT23-5 package ideal for portable and space-limited applications.
• Non-Synchronous Topology: Simple external component count with diode-based rectification.
• Robust Performance: MSL 1 (Unlimited) moisture sensitivity ensures reliability in storage and assembly.

LM27313XMFX Applications

The LM27313XMFX excels in applications requiring efficient step-up voltage conversion, including:

• Portable Electronics: Powering displays, LEDs, or sensors from single-cell Li-ion or alkaline batteries.
• Industrial Systems: Providing stable voltage rails for embedded controllers and sensors.
• Automotive Accessories: Supporting infotainment or lighting systems where input voltage varies.
• Medical Devices: Compact power solutions for handheld diagnostic equipment.

Conclusion of LM27313XMFX

The LM27313XMFX is a high-performance boost regulator offering a balance of compact size, efficiency, and flexibility. Its wide input range and adjustable output make it ideal for diverse low-power applications, though designers should note its obsolete status and consider alternative solutions for new designs. For legacy systems or specific use cases requiring a proven, high-frequency boost converter, this IC remains a strong candidate.