Texas Instruments

LM2594MX-5.0  

DC Switching Voltage Regulators

LM2594MX-5.0 Description

The LM2594MX-5.0 from Texas Instruments is a step-down (buck) and inverting DC-DC switching regulator designed for efficient power conversion in a compact 8-pin SOIC package. It delivers a fixed 5V output with a maximum current of 0.5A, making it ideal for low-to-medium power applications. With an input voltage range of 4.5V to 40V, it supports a wide variety of power sources, including automotive, industrial, and battery-powered systems. The regulator operates at a switching frequency of 127kHz to 173kHz, ensuring minimal noise and high efficiency (82% typical). Its surface-mount design and tape-and-reel packaging facilitate automated assembly processes.

LM2594MX-5.0 Features

• Wide Input Range (4.5V–40V): Suitable for diverse power sources, including unregulated supplies.
• High Efficiency (82% Typical): Reduces power dissipation and thermal stress.
• Fixed 5V Output: Eliminates the need for external feedback resistors, simplifying design.
• Low Quiescent Current (5mA Typical): Enhances battery life in portable applications.
• Compact SOIC-8 Package: Space-efficient for PCB-constrained designs.
• ESD Protection (2kV HBM): Improves reliability in harsh environments.
• Single Output, Step-Down/Inverting Capability: Supports both buck and inverting topologies.
• Automotive-Grade Alternatives Available: Though this variant is not PPAP/automotive certified, TI offers compliant versions for automotive use.

LM2594MX-5.0 Applications

• Industrial Power Supplies: For PLCs, sensors, and control systems requiring stable 5V rails.
• Battery-Powered Devices: Portable equipment, IoT nodes, and handheld instruments benefit from its efficiency.
• Automotive Electronics: Non-critical systems like infotainment or lighting (where non-automotive compliance is acceptable).
• Embedded Systems: Microcontroller power management in consumer electronics.
• Negative Voltage Generation: Inverting capability enables -5V rails for analog circuits.

Conclusion of LM2594MX-5.0

The LM2594MX-5.0 is a versatile, cost-effective switching regulator offering high efficiency, wide input range, and compact packaging. While it lacks automotive certification, its robust performance makes it suitable for industrial, consumer, and portable applications. Engineers will appreciate its simplified design (fixed output) and flexibility (buck/inverting modes). For higher reliability needs, TI’s automotive-grade alternatives are recommended. Overall, this regulator balances performance, size, and cost for mid-power DC-DC conversion.

LM2594MX-5.0 Documents

Download datasheets and manufacturer documentation for LM2594MX-5.0