LM2670T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2670T-3.3 is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator manufactured by National Semiconductor (Texas Instruments). It operates with an input voltage range of 8V to 40V and provides a fixed 3.3V output. The device integrates a synchronous rectifier for improved efficiency and features a switching frequency of 260kHz. It supports operation over a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous rectifier to enhance conversion efficiency compared to standard diode-based designs.
• Utilizes the SIMPLE SWITCHER architecture to simplify design implementation and reduce component count.
• Includes internal compensation and current limiting for stable operation under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in industrial equipment
• Power supply stages for embedded systems
• Battery-powered devices requiring efficient voltage stepping

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets are managed by Texas Instruments. Confirm the suffix 'T' indicates tape-and-reel packaging if applicable to your assembly process. Ensure the specific revision matches your schematic requirements. Cross-reference the exact part number against official distributor catalogs to confirm availability and authenticity before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from an 8V to 40V input source. The synchronous design offers higher efficiency than non-synchronous variants like the LM2679. Consider the 260kHz switching frequency for balancing component size and efficiency. Verify that the thermal performance of the chosen package meets the application's power dissipation needs.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2670 belongs to the SIMPLE SWITCHER family of high-efficiency step-down regulators. It is part of a broader series including adjustable versions and other current ratings. The device represents a transition from older National Semiconductor products now integrated into Texas Instruments' portfolio, maintaining compatibility with existing designs while offering enhanced synchronous performance.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2670SDX-3.3/NOPB: Pin-compatible alternative with updated packaging.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2670T-3.3?

The maximum input voltage is 40V.

Does the LM2670T-3.3 include a synchronous rectifier?

Yes, it integrates a synchronous rectifier for improved efficiency.