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LM2676SX-12

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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lm2676sx-12-etched.glb lm2676sx-12: factory component page (tier=lcsc) · Ray 1d ago
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LM2676SX-12

Texas Instruments · DC-DC Converters · TO-263-7

LM2676SX-12 from Texas Instruments, in a TO-263-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Switch_output output Source of the internal high-side FET and the switching node, connected to the inductor and the external diode cathode, with the negative swing kept above -1 V per the catch-diode guidance.
2 Input input Power input to the high-side FET collector and internal circuits, which must operate within 8 V to 40 V and be bypassed close to this pin with CIN.
3 CB input Bootstrap capacitor connection for the high-side driver, with the capacitor connected between CB and Switch_output (the pin table specifies 100 nF, while section 6.3.3 recommends 0.01 µF).
4 GND power_in Power ground connected to system ground, with the path to CIN and COUT grounds kept as short as possible.
5 NC unconnected No internal connection; leave this pin unconnected.
6 FB input Feedback sense input that must be connected directly to the regulated output for the fixed-output versions (including 12 V) and kept free of inductor flux coupling.
7 ON/OFF input Enable input where high or floating enables the regulator and pulling below 0.8 V fully shuts it down, with the on-state voltage not to exceed the 6 V absolute maximum when electrically driven.
8 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-263-7
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: LM2676SX-12
  • Footprint: Package_TO_SOT_SMD:TO-263-7_TabPin8
  • 3D model: TO-263-7 (KiCad packages3D, STEP)
  • 3D model files: lm2676sx-12-etched.step / lm2676sx-12-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2676sx-12.step / lm2676sx-12.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (40 pp, sha256 e66be2b2a64d67e2, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF