LM2671N-5.0 Equivalent & Substitute Parts

Part Overview

The LM2671N-5.0 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 5V output. This device delivers 500mA output current and operates across a 6.5V to 40V input range, making it suitable for industrial and embedded power supply applications.

The LM2671N-5.0 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for legacy systems and new designs requiring this performance class.

Substiute Parts

LM2671N-5.0

Texas InstrumentsIn Stock: 1043LM2671N-5.0 Datasheet

Current PartRFQ

LM2671N-5.0/NOPB

Texas InstrumentsIn Stock: 1027LM2671N-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2671N-5.0 is determined by strict equivalence across the following electrical and mechanical parameters:

• Fixed output voltage of 5V
• Minimum output current rating of 500mA
• Input voltage range compatibility (6.5V to 40V minimum)
• Switching frequency of 260kHz
• Through-hole mounting in 8-DIP package (0.300", 7.62mm)
• Operating temperature range of -40°C to 125°C
• Buck topology with positive output configuration

The LM2671N-5.0/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The LM2671N-5.0/NOPB is the direct functional equivalent of the LM2671N-5.0. Selection between these parts should be based on the following criteria:

Product Status: The LM2671N-5.0 is obsolete, while the LM2671N-5.0/NOPB maintains active status. For new designs and ongoing production, the active part number is preferred to ensure long-term supply chain availability.

Regulatory Compliance: The LM2671N-5.0/NOPB is ROHS3 compliant, whereas the LM2671N-5.0 is RoHS non-compliant. Applications subject to RoHS regulations or customer requirements for lead-free components must use the LM2671N-5.0/NOPB variant.

Packaging: The LM2671N-5.0/NOPB is supplied in tube packaging, which is standard for active production parts. The original LM2671N-5.0 packaging format is unspecified in available documentation.

Both parts share identical electrical performance, thermal characteristics, and physical package dimensions, ensuring direct pin-for-pin compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the LM2671N-5.0/NOPB replace the LM2671N-5.0 in existing designs?

A: Yes. The LM2671N-5.0/NOPB is electrically and mechanically identical to the LM2671N-5.0. Both devices feature the same 5V fixed output, 500mA current rating, 260kHz switching frequency, and 8-DIP through-hole package. Direct substitution is possible without circuit modifications.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" suffix indicates a lead-free (no-lead) component that is ROHS3 compliant. This variant meets environmental and regulatory requirements for restricted hazardous substances, whereas the base LM2671N-5.0 is RoHS non-compliant.

Q: Why is the LM2671N-5.0 listed as obsolete?

A: Obsolescence reflects Texas Instruments' product lifecycle management. The LM2671N-5.0/NOPB remains in active production and is the recommended part for all new applications and ongoing supply requirements.

Q: Are there package compatibility considerations?

A: Both parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging. PCB footprints, pin assignments, and mounting procedures are identical. No layout or assembly modifications are required.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is valid when the following parameters match: 5V fixed output voltage, 500mA minimum output current, 6.5V to 40V input voltage range, 260kHz switching frequency, -40°C to 125°C operating temperature, and 8-DIP through-hole package configuration.