The LM2673LDX-5.0 is a step-down voltage regulator from Texas Instruments (formerly National Semiconductor), designed for efficient power conversion in various electronic applications. It is a monolithic integrated circuit capable of delivering up to 3A of output current with excellent line and load regulation. This particular variant provides a fixed 5.0V output.

Applications:

• Simple High-Efficiency Step-Down Regulator
• On-Card Switching Regulators
• Positive to Negative Converter
• LCD Monitor Power Supplies
• Battery Chargers

Features:

• 3.3V, 5V, 12V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range, 1.23V to 37V ±4%
• Guaranteed 3.0A Output Current Capability
• Wide Input Voltage Range, 8V to 40V
• Requires Only a Minimal Number of External Components
• Fixed Frequency 260 kHz Internal Oscillator
• TTL Shutdown Capability
• Low Power Standby Mode, IQ Typical
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection

Benefits:

• High Efficiency: The device's high efficiency minimizes power losses, reducing heat dissipation and extending battery life in portable applications.
• Simplified Design: The need for only a minimal number of external components simplifies the design process and reduces the overall cost.
• Stable and Reliable Output: The LM2673LDX-5.0 provides a stable and regulated 5.0V output, ensuring proper operation of connected devices.
• Protection Features: Thermal shutdown and current limit protection safeguard the device and connected components from damage due to over-temperature or over-current conditions.
• Wide Input Voltage Range: Operates with input voltages from 8V to 40V, making it suitable for a variety of applications.

Additional Details:

The LM2673LDX-5.0 utilizes a fixed-frequency PWM (Pulse Width Modulation) control scheme for efficient voltage conversion. It incorporates internal compensation to minimize the number of external components required. The device is available in a TO-263 package, designed for efficient heat dissipation. The 260kHz switching frequency allows for the use of smaller inductor and capacitor values, further reducing the overall size and cost of the power supply. The TTL shutdown capability provides a convenient way to disable the regulator and reduce power consumption when it is not needed.