LM2673S-12-NS

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673S-12-NS is a fixed-output buck switching regulator IC from the SIMPLE SWITCHER® series, manufactured by National Semiconductor. It provides a fixed 12V output with a maximum load current of 3A. The device operates within an input voltage range of 8V to 40V and utilizes a 260kHz switching frequency. It features a positive output configuration in a 14-VSON (6x5) package with exposed pad. The component supports junction temperatures from -40°C to 125°C and lacks synchronous rectification.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology for step-down voltage regulation
• Fixed 12V output capability with 3A continuous load current support
• Wide input voltage operating range accommodating 8V to 40V sources
• Built-in thermal shutdown and current limit protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input voltage step-down from 24V or 48V industrial buses
• Power supply stages for communication equipment
• Battery-powered devices requiring efficient voltage conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized distributors or certified suppliers. Confirm package marking matches the 14-VSON specification. Check datasheet revisions for any pinout or electrical parameter updates. Ensure storage conditions comply with moisture sensitivity levels. Validate that the specific suffix corresponds to the requested tape-and-reel or tube packaging variant if applicable.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output at 3A is required from an input between 8V and 40V. Consider the 260kHz switching frequency for inductor size trade-offs. Evaluate thermal performance given the exposed pad package for heat dissipation requirements. Compare against adjustable variants if flexible output voltages are needed instead of the fixed 12V option.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2673 family of simple switcher regulators. It shares core architecture with other outputs in the series, differing primarily in the internal feedback resistor network setting the 12V output. The 'S' suffix typically denotes the SOIC-14 or similar plastic package variant depending on manufacturer coding, while 'NS' indicates National Semiconductor origin.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible replacements may include LM2673MX-12 or LM2673SDX-12 from Texas Instruments after National Semiconductor acquisition. Verify equivalent electrical parameters such as switching frequency and current limits. Ensure thermal resistance characteristics match the target PCB layout constraints.