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LM2678SX-ADJ
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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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README.mdadded+45@@ -0,0 +1,45 @@+# LM2678SX-ADJ++**Texas Instruments** · DC-DC Converters · TO-263-7++LM2678SX-ADJ 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 | Switch output; internal high-side FET source pin connected to inductor and external Schottky diode cathode. |+| 2 | Input | power_in | Power supply input (VIN 8V to 40V) connected to high-side FET drain; requires low-impedance input bypass capacitor with short trace to ground. |+| 3 | CB | input | Bootstrap capacitor connection pin; connect 100nF capacitor between this pin and switch output (pin 1) to drive gate above VIN. |+| 4 | GND | power_in | Power ground reference; system ground connection and return path for all input/output filter capacitor currents. |+| 5 | NC | unconnected | No connection pin; must be left unconnected in all applications. |+| 6 | FB | input | Feedback input; connect to feedback divider midpoint (ADJ version) to set VOUT, or directly to output capacitor (fixed versions); VFB = 1.21V nominal. |+| 7 | ON/OFF | input | Regulator enable input with 1.4V threshold; high ≥1.4V enables switching, low <0.8V disables to 50µA standby current. |+| 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: `LM2678SX-ADJ`+- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin8`+- 3D model: TO-263-7 (KiCad packages3D, STEP)+- 3D model files: `lm2678sx-adj-etched.step` / `lm2678sx-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2678sx-adj.step` / `lm2678sx-adj.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm2678) (40 pp, sha256 `a29752502faa09c0`, retrieved 2026-09-25, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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](docs/lm2678sx-adj-datasheet.pdf)
page.jsonadded+159@@ -0,0 +1,159 @@+{+ "slug": "lm2678sx-adj",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm2678sx-adj",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm2678sx-adj.kicad_sym",+ "lm2678sx-adj.kicad_mod",+ "lm2678sx-adj.glb",+ "lm2678sx-adj.step",+ "lm2678sx-adj.lbr",+ "docs/hero.png",+ "docs/lm2678sx-adj-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM2678SX-ADJ",+ "manufacturer": "Texas Instruments",+ "package": "TO-263-7",+ "pin_count": 8,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm2678",+ "parts": {+ "symbol": "lm2678sx-adj.kicad_sym",+ "footprint": "lm2678sx-adj.kicad_mod",+ "model_3d": "lm2678sx-adj-etched.glb",+ "model_3d_plain": "lm2678sx-adj.glb",+ "model_3d_step": "lm2678sx-adj-etched.step",+ "model_3d_step_plain": "lm2678sx-adj.step",+ "lbr": "lm2678sx-adj.lbr"+ },+ "distributor_links": {+ "lcsc": "C40844",+ "digikey": "LM2678SX-ADJTR-ND",+ "mouser": "926-LM2678SX-ADJ"+ },+ "distributor_check": {+ "checked_at": "2026-09-25T14:36:40Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "LM2678SX-ADJTR-ND",+ "status": "found",+ "lifecycle": "Obsolete"+ },+ "mouser": {+ "pn": "926-LM2678SX-ADJ",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "Switch_output",+ "type": "output",+ "description": "Switch output; internal high-side FET source pin connected to inductor and external Schottky diode cathode."+ },+ {+ "number": "2",+ "name": "Input",+ "type": "power_in",+ "description": "Power supply input (VIN 8V to 40V) connected to high-side FET drain; requires low-impedance input bypass capacitor with short trace to ground."+ },+ {+ "number": "3",+ "name": "CB",+ "type": "input",+ "description": "Bootstrap capacitor connection pin; connect 100nF capacitor between this pin and switch output (pin 1) to drive gate above VIN."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Power ground reference; system ground connection and return path for all input/output filter capacitor currents."+ },+ {+ "number": "5",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection pin; must be left unconnected in all applications."+ },+ {+ "number": "6",+ "name": "FB",+ "type": "input",+ "description": "Feedback input; connect to feedback divider midpoint (ADJ version) to set VOUT, or directly to output capacitor (fixed versions); VFB = 1.21V nominal."+ },+ {+ "number": "7",+ "name": "ON/OFF",+ "type": "input",+ "description": "Regulator enable input with 1.4V threshold; high ≥1.4V enables switching, low <0.8V disables to 50µA standby current."+ },+ {+ "number": "8",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 8 added from the footprint"+ ],+ "pages_sent": 40,+ "cost_usd": 0.3673,+ "at": "2026-09-25T14:36:19"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm2678",+ "pages": 40,+ "sha256": "a29752502faa09c0",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}