All Alternatives

Alternatives to Texas Instruments LM2676S-5.0

Texas Instruments LM2676S-5.0 and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for Texas Instruments LM2676S-5.0

LM2676S-5.0 compared against its qualified second sources
LM2676S-5.0Texas InstrumentsLM2676S-ADJ/NOPBTexas InstrumentsLM2670S-5.0/NOPBTexas Instruments+1more
FFF CompatibilityPins physically line up perfectly, but Pin 6 (Feedback) requires an external resistor divider to set the 5.0V output rather than a direct connection.Uses the exact same KTW (TO-263-7) package footprint.Once output voltage is set via external resistors, electrical behavior and thermal specifications are identical.Pinout matches exactly for 6 of the 7 pins, but Pin 5 is designated as a SYNC pin on the LM2670S instead of NC (No Connect). If Pin 5 is left floating on the original PCB, it acts as a direct drop-in.Housed in the identical KTW (TO-263-7 / DDPAK-7) surface mount package with matching physical dimensions.Both are 3A high-efficiency step-down regulators operating at 260 kHz with identical electrical performance.
AI Summary

LM2676S-5.0 by Texas Instruments: Buck Switching Regulator IC Positive Fixed 5V 1 Output 3A TO-263-8, D2PAK (7 Leads + Tab), TO-263CA.

The adjustable version of the LM2676 remains active and provides identical performance and package compatibility. It requires adding a resistor divider (e.g., R1=1kOhm, R2=3.13kOhm) to configure the feedback pin for 5.0V. This is a reliable option if fixed-voltage stock is fully depleted.

  • Maintains same base silicon architecture and thermal properties
  • Identical 3A current rating and 260 kHz switching frequency
  • Identical 8V to 40V input range
  • Requires adding two external feedback resistors to set the 5V output

The LM2670S-5.0/NOPB is an active, highly compatible alternative from the same Simple Switcher family that offers identical electrical ratings. If the NC pin (Pin 5) on your original board is floating, this part functions as a direct drop-in replacement. Use this to maintain identical circuit characteristics without altering the layout.

  • Drop-in pin matching for pins 1-4 and 6-7
  • Identical 3A output current capability
  • Matches original 260 kHz switching frequency
  • Pin 5 must be floating on the PCB layout for it to act as a direct drop-in
Lifecycle StatusObsoleteActiveActive
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