LM2675N-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2675N-3.3/NOPB is a fixed-output step-down switching regulator from Texas Instruments, designed for high-efficiency power conversion. It operates with an input voltage range of 8 V to 40 V and provides a fixed 3.3 V output at a maximum current of 1 A. The device features a switching frequency of 260 kHz and achieves up to 86% efficiency. It is housed in an 8-pin MDIP package suitable for through-hole mounting, with an operating temperature range from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology simplifies design by requiring minimal external components.
• Fixed 3.3 V output eliminates the need for external feedback resistors for standard voltage rails.
• High switching frequency allows for the use of small passive components to reduce overall solution size.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Pre-regulation for linear post-regulators
• Battery-powered systems requiring efficient voltage stepping

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free and RoHS compliance as per manufacturer specifications. Ensure the 'N' designation matches the required through-hole MDIP package variant rather than surface-mount options. Cross-reference the specific revision level against the latest datasheet to confirm pinout and thermal characteristics remain unchanged for your application requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V rail is needed with up to 1 A load capability from an 8–40 V source. Consider the through-hole MDIP package if PCB layout constraints or mechanical stability requirements favor over-soldered surface mount alternatives. Evaluate thermal dissipation needs given the 1 A output capacity and efficiency ratings under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2675 SIMPLE SWITCHER series, which offers a complete family of step-down regulators. Variants within the series include adjustable outputs (ADJ) and other fixed voltages (e.g., 5.0V, 12V). The LM2675N specifically denotes the through-hole version, distinct from the surface-mount LM2675M or WSON packages available in the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2675N-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage required for proper regulation?

The device requires a minimum input voltage of 8 V to maintain stable operation and regulation.

Is the output voltage adjustable?

No, the LM2675N-3.3/NOPB has a fixed internal feedback network that sets the output strictly to 3.3 V.