LM2673LD-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2673LD-3.3 is a fixed-output step-down switching regulator from the SIMPLE SWITCHER® series, manufactured by National Semiconductor. It provides a fixed 3.3V 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 pulse width modulation control and lacks synchronous rectification. The component is housed in a 14-VSON (6x5) package with a bare thermal pad, suitable for surface mount installation. It supports a junction temperature range from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage DMOS switch rated for 40V input
• Fixed 3.3V output configuration for simplified design
• Built-in frequency compensation for minimal external components
• Thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Battery-powered equipment power supplies
• General-purpose DC/DC conversion modules
• Embedded system voltage regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity due to discontinued status and potential third-party distribution. Confirm package marking matches the 14-VSON specification. Check datasheet revisions for any parameter updates. Ensure supplier documentation aligns with National Semiconductor or Texas Instruments standards. Validate RoHS compliance status as indicated in official records.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at 3A is required from an 8V to 40V input source. Consider the 260kHz switching frequency for inductor size trade-offs. Evaluate thermal performance given the bare pad package. Compare against adjustable variants if voltage flexibility is needed. Ensure application temperatures fall within the specified -40°C to 125°C range.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the SIMPLE SWITCHER® family, designed for ease of use with minimal external components. The LM2673 series offers various output voltages and current ratings. This specific model targets applications requiring stable 3.3V rails. It shares architectural similarities with other members like the LM2676 but differs in pinout and current capabilities.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Consult manufacturer cross-reference guides for compatible alternatives. Verify electrical parameters and pin compatibility before substitution.